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Author Topic: Sheetmetal Date Code  (Read 3782 times)
ZLP955
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« on: September 15, 2013, 03:56:09 AM »

I was stripping down a used driver's side door from a '69 today, when I noticed that the inner panel of the door shell had 2 different date codes stamped on it. I've added some photos, showing the location of the 2 stamps (circled in red) and each of the two date stamps. How come there is a gap of several weeks (from week '39' to '43') between the stamps? The 'H39 1' stamp is upright and the 'H43' is upside-down.
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Tim - New South Wales, Australia
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« Reply #1 on: September 15, 2013, 12:00:40 PM »

Good question - I haven't seen a Fisher Body Run Number double-stamped before; that date marker is recessed in a machined pocket in the draw die (where it also serves as a proof mark for draw punch travel).
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« Reply #2 on: September 19, 2013, 02:23:49 AM »

Just checked passenger side door, came from the same donor car, and it has 2 different date codes too.
Nobody else come across this?
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Tim - New South Wales, Australia
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« Reply #3 on: September 19, 2013, 02:56:59 PM »

Yes, My LH door has a H49 on top H50 on bottom. Now I am going from memory and those numbers may not be exact. The car is up on my lift right now and there is a car undeneath, so I cannot look at it. It is the original door and it is a 12B Norwood car. Door panel is off as I am waiting to get bodywork done. I thought it was odd when I saw it, but was hesitant to post as I am still new to posting pics.I have 2 other cars with original sheetmetal I can check, if I get time.
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« Reply #4 on: September 19, 2013, 04:14:38 PM »

Thanks for the reply, and yes if you get a chance, it would be nice to know if your other cars have the same issue.
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Tim - New South Wales, Australia
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« Reply #5 on: September 19, 2013, 04:16:00 PM »

Mines apart right now so I can check the doors for ( 68) difference ?  I do have a question. While it's apart I'm documenting all the numbers ,taking pics and sending copies to Ed B. Concerning the sheet metal: are all panels/pieces stamped ? Front clip etc...? It's all OE and wonderful shape so somewhere I want it noted. I know doors ,hood---can't find it on fenders ,valiance, etc. My body man is also shooting pics and leaving the undersides untouched. Lots of inspection markings. Anyway I'll get those pics of the doors posted in the near future--Saturday.
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« Reply #6 on: September 19, 2013, 06:59:03 PM »

My 01C Norwood built '69 RS is currently in paint and body.  Driver (LH) door has one stamp (H34) - at the bottom.  Couldn't find andy stamp on the passenger door.
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Richard Thomas
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« Reply #7 on: September 19, 2013, 10:16:44 PM »

I know doors ,hood---can't find it on fenders ,valiance, etc.
http://www.camaros.org/numbers.shtml#sheet
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Kurt S
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« Reply #8 on: September 19, 2013, 10:23:13 PM »

Concerning the sheet metal: are all panels/pieces stamped ? Front clip etc...? It's all OE and wonderful shape so somewhere I want it noted. I know doors ,hood---can't find it on fenders ,valiance, etc.
As far as I know, all original sheetmetal parts have a date stamp, although I haven't checked my entire car yet. So far, I have found the following:
Quarters are stamped in the weatherstrip gutter area, near the rear window filler panel joint;
Trunk lid stamped on the underside stiffener brace near the centerline;
Doors - as shown in pictures above;
Header panel - stamped on underside, just to one side of the centerline;
Valance - I recall it is stamped on one end, where it bolts to fender extn, but will have to check;
Roof skin side support structure - driver's side, towards rear of door glass.
Fenders and fender extensions - haven't had a close look for these yet.
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Tim - New South Wales, Australia
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« Reply #9 on: September 19, 2013, 10:58:47 PM »

thanks for the reply
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« Reply #10 on: September 20, 2013, 01:11:04 AM »

janobyte;
  (quote);Concerning the sheet metal: are all panels/pieces stamped ? Front clip etc...? It's all OE and wonderful shape so somewhere I want it noted. I know doors ,hood---can't find it on fenders ,valiance, etc.(quote)
  I am attaching a picture of where the Dr. Front Fender date code is on my '67.  Pass. Front Fender is in similar position. They are 3/8 in. letters and not stamped very deep.
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« Reply #11 on: September 22, 2013, 04:20:01 PM »

Found a couple more stamps over the weekend. Fenders are stamped exactly where Mike's are, in the above photo, and both seat back braces are stamped in the center, about half way between the rectangular hole (near the bottom) and where the 'Y' fork occurs.
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Tim - New South Wales, Australia
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« Reply #12 on: September 22, 2013, 04:46:41 PM »

Thanks again, didn't have a chance to get those door pics, will get to it this week.
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janobyte
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« Reply #13 on: September 27, 2013, 05:20:38 PM »

Took pics of the doors today, 1# on driver's , 2#s on pass. Will post tomorrow. Fenders are primed, not going to sand for number ( guy painting my car would blow a gasket if I did) Plus he's shooting  as he's stripping( showing no filler) Knows what to look for ,might already have them.
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« Reply #14 on: September 30, 2013, 04:54:08 PM »

driver,pass 68
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janobyte
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« Reply #15 on: September 30, 2013, 04:56:01 PM »

one more
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69Z28-RS
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« Reply #16 on: September 30, 2013, 07:22:29 PM »

My drivers door, the only door I've checked, is  'H 37 -1'    which is within 1 or 2 weeks of the production week 09C.   How close are the doors on you fellas' cars to your production week??
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« Reply #17 on: September 30, 2013, 08:30:05 PM »

Mine are H 17 - 1 on the LH door.  Every place I've found has been H 17 - 1 on a 05A build date.

Bryan
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Bryan S.
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« Reply #18 on: September 30, 2013, 10:22:38 PM »

My drivers door, the only door I've checked, is  'H 37 -1'    which is within 1 or 2 weeks of the production week 09C.   How close are the doors on you fellas' cars to your production week??
  I found several date codes on my car and most of them were 1 to 2 weeks prior, the pic. I posted of Drivers Front fender (41) was furthest out about 4 weeks, and the only one.
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« Reply #19 on: September 30, 2013, 11:02:05 PM »

Thanks for the photos janobyte. I may have missed something, but did you say that the 'H 12' and 'H 17' are both on the same door?
My drivers door, the only door I've checked, is  'H 37 -1'    which is within 1 or 2 weeks of the production week 09C.   How close are the doors on you fellas' cars to your production week??
Gary, the door in the photos at the start of this thread is from a parts car, but on my 04A car, almost all of the panels are stamped 'T 12'; so far I have found one 'H 7' and the latest is '13' (the flat hood) which is cutting things fine for an 04A build.....
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Tim - New South Wales, Australia
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« Reply #20 on: September 30, 2013, 11:13:54 PM »

The closeness of sheet metal production to car usage implies that the sheetmetal items were pretty much JIT (just in time) even back then.. I suppose that's more true for sheet metal than some other smaller parts, in part due to the difficulty of warehousing large quantities of these larger bulkier parts.   I'd bet John Z can shed some good light on this subject..  Smiley
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
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« Reply #21 on: October 01, 2013, 10:03:15 AM »

The closeness of sheet metal production to car usage implies that the sheetmetal items were pretty much JIT (just in time) even back then.. I suppose that's more true for sheet metal than some other smaller parts, in part due to the difficulty of warehousing large quantities of these larger bulkier parts.   I'd bet John Z can shed some good light on this subject..  Smiley

In those days, cars were selling like hotcakes, and the system was stretched to its limits most of the time; for a stamping plant, that meant racks were in short supply, and you can't produce stampings unless you have the proper shipping racks for the panels (each panel had hundreds of special racks designed just for that panel) - there weren't any "warehouses" to store stampngs - the only "storage" was in the rail cars that hauled the racks of panels to the assembly plants.
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« Reply #22 on: October 01, 2013, 10:17:27 AM »

Upside down H12 and right side up H17 on pass door. BTY car's 04D Norwood built. H172 on driver's. Doors are un-molested in any way. (except for door speakers---ugg !)
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69Z28-RS
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« Reply #23 on: October 01, 2013, 11:20:39 AM »

The closeness of sheet metal production to car usage implies that the sheetmetal items were pretty much JIT (just in time) even back then.. I suppose that's more true for sheet metal than some other smaller parts, in part due to the difficulty of warehousing large quantities of these larger bulkier parts.   I'd bet John Z can shed some good light on this subject..  Smiley

In those days, cars were selling like hotcakes, and the system was stretched to its limits most of the time; for a stamping plant, that meant racks were in short supply, and you can't produce stampings unless you have the proper shipping racks for the panels (each panel had hundreds of special racks designed just for that panel) - there weren't any "warehouses" to store stampngs - the only "storage" was in the rail cars that hauled the racks of panels to the assembly plants.

Thanks for confirmation, John..      that's as I thought....  Smiley
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
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60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
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« Reply #24 on: October 01, 2013, 11:32:06 AM »

In those days, cars were selling like hotcakes, and the system was stretched to its limits most of the time; for a stamping plant, that meant racks were in short supply, and you can't produce stampings unless you have the proper shipping racks for the panels (each panel had hundreds of special racks designed just for that panel) - there weren't any "warehouses" to store stampngs - the only "storage" was in the rail cars that hauled the racks of panels to the assembly plants.

Referring back to post #7 on page 1 of this thread, would it be kind of odd then that the sheetmetal date code stamped into the driver side door of my car is H34 for an 01C built car?  Quite a time diffrerence between the 34th calendar week of 1968 and 01C bulid (the 3rd week of January 1969).
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Richard Thomas
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« Reply #25 on: October 01, 2013, 01:15:57 PM »

Not i
In those days, cars were selling like hotcakes, and the system was stretched to its limits most of the time; for a stamping plant, that meant racks were in short supply, and you can't produce stampings unless you have the proper shipping racks for the panels (each panel had hundreds of special racks designed just for that panel) - there weren't any "warehouses" to store stampngs - the only "storage" was in the rail cars that hauled the racks of panels to the assembly plants.

Referring back to post #7 on page 1 of this thread, would it be kind of odd then that the sheetmetal date code stamped into the driver side door of my car is H34 for an 01C built car?  Quite a time diffrerence between the 34th calendar week of 1968 and 01C bulid (the 3rd week of January 1969).
Not if your door had gotten replaced somewhere along the way???
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
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« Reply #26 on: October 01, 2013, 04:11:18 PM »

Upside down H12 and right side up H17 on pass door.
Thanks for confirming. Interesting that your door has 2 stamps as well.....
I guess we're unlikely to ever find out why, unless someone who worked in one of the many stamping plants (and knows why it occurred) reads this.
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Tim - New South Wales, Australia
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« Reply #27 on: October 02, 2013, 02:44:29 AM »

Sounds like they were changing locations of the stamp in the die and hadn't (or forgot to) removed the original location.
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Kurt S
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« Reply #28 on: October 02, 2013, 10:41:29 AM »

Kurt,.. 
That's a reasonable theory..   could be..    only thing I've heard that makes sense...
If we knew those dates, and had some dates before and after along with the die location, we might be able to confirm that theory...

Gary
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
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« Reply #29 on: November 17, 2013, 06:08:13 PM »

How bout this one? 64? the car is a 12C all the other panels are between H46-H50 I think the characters were in upside down and or out of order. lol Huh

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James
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« Reply #30 on: November 18, 2013, 05:58:55 AM »

James, I've seen several other stamps with one digit upside down, so imagine it was H49.......
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Tim - New South Wales, Australia
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