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Author Topic: 1100837 Alternator Stamping - Original?  (Read 3371 times)
Edgemontvillage
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« on: November 01, 2013, 10:19:54 AM »

Would appreciate opinions as to the originality of this 837 stamping:




Additional photos:



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Lloyd
1969 RS Z/28 10 10 Preservation
cook_dw
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« Reply #1 on: November 01, 2013, 10:25:55 AM »

The 11 & 837 look larger than the 00..??..

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Darrell Cook

1967 LeMans Blue SS/RS L35 clone
1968 Rallye Green SS L78 - unrestored original
1968 Matador Red Z28
BULLITT65
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« Reply #2 on: November 01, 2013, 10:55:30 AM »

I don't have a good pic of mine to post, but the stamp on mine appears to be more uniform as far as the font. I agree with Cook, it looks like the 11 and 837 look a tad thicker and larger than the 00.
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1969 garnet red Z/28 46k mile unrestored X77
Looking for 3192477 (front) spiral shocks 3192851 (rear) please
Looking for an original LOF soft ray windshield
Looking for original Delco side post negative battery cable part # 6297651AV
cook_dw
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« Reply #3 on: November 01, 2013, 11:14:03 AM »

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Darrell Cook

1967 LeMans Blue SS/RS L35 clone
1968 Rallye Green SS L78 - unrestored original
1968 Matador Red Z28
Hans L
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« Reply #4 on: November 01, 2013, 11:36:20 AM »

Lloyd - just a word of caution on "837" alternators - I had to source one for my Z last year.  I really struggled to sort out real from the fakes.   It takes a real pro to know is what I found out.   Fortunately, Jerry MacNiesh was rebuilding my engine at the time and I was able to get his confirmation the one I was considering was real.   I think he rejected 90% of the ones I sent him for consideration (at least 15 - 20 samples).   I was quite shocked how many re-stamps are out there.   

Heres the one I bought, confirmed by Jerry as a real "837".   It's a little early for my build (March), but within the acceptable range.   Also, I'll take a better pic if needed.

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http://www.littooy.com/hans/
'69 Camaro RS Z/28 Van Nuys Built
dannystarr
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« Reply #5 on: November 01, 2013, 11:51:31 AM »

Wow, it almost looks like your alt. # has the 11 and 837 bigger. Maybe it's just the angle. Sure would be nice to pull that bolt, and stand it up for a better straight on shot.  Smiley... Danny
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Hans L
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« Reply #6 on: November 01, 2013, 12:04:28 PM »

It's not - here's the best other pic I have.  I'll take a better pic this weekend and post.  Jerry M confirmed it's real and rebuilt/restored it.

« Last Edit: November 01, 2013, 12:28:08 PM by Hans L » Logged

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'69 Camaro RS Z/28 Van Nuys Built
Edgemontvillage
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« Reply #7 on: November 01, 2013, 12:13:02 PM »

Lloyd - just a word of caution on "837" alternators - I had to source one for my Z last year.  I really struggled to sort out real from the fakes.   It takes a real pro to know is what I found out.   Fortunately, Jerry MacNiesh was rebuilding my engine at the time and I was able to get his confirmation the one I was considering was real.   I think he rejected 90% of the ones I sent him for consideration (at least 15 - 20 samples).   I was quite shocked how many re-stamps are out there.  

Heres the one I bought, confirmed by Jerry as a real "837".   It's a little early for my build (March), but within the acceptable range.   Also, I'll take a better pic if needed.




Yes, I agree with your comments Hans.  I have seen plenty of 837 stamps and the impressions are most all inconsistant - they were hand/gang stamped for identification and not for artistic merit.  On your 837 the bottom of the 0s (zeros) appear irregular and the foot of the first number 1 (one) is mis-stamped, typical irregularities found on others.  I have been paying far more attention to the condition of the aluminum case on un-restored orginals as its extremely difficult to fake / replicate 45 years of patina so tampering is easier to detect.  
« Last Edit: November 01, 2013, 12:32:58 PM by Edgemontvillage » Logged

Lloyd
1969 RS Z/28 10 10 Preservation
copo
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« Reply #8 on: November 01, 2013, 01:28:01 PM »

There is another 837 alternator on Ebay #251370450530 with the same date to do a comparison.
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Edgemontvillage
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« Reply #9 on: November 01, 2013, 02:00:26 PM »

There is another 837 alternator on Ebay #251370450530 with the same date to do a comparison.

Dates are 1 month apart.

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Lloyd
1969 RS Z/28 10 10 Preservation
DT
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« Reply #10 on: November 03, 2013, 10:07:15 AM »

I'm no expert buy that looks pretty damn good to me Edge.  Check this link out, it is a RE-STAMPhttp://yenkocamaroparts.com/images/Alternator%201100837.jpg
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Donny
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« Reply #11 on: November 03, 2013, 11:19:11 AM »

I'm no expert buy that looks pretty damn good to me Edge.  Check this link out, it is a RE-STAMP:  http://yenkocamaroparts.com/images/Alternator%201100837.jpg

 I agree with DT. The stamp looks OK to me and has an original patina to it along with some character imperfections. I'm sure there must have been more than one mechanical stamper in production to keep up with the demand which would account for differences even between close dates. Restamps look too good, IMO.

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
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« Reply #12 on: November 03, 2013, 12:11:20 PM »

That re-stamp looks really nice. Like they spent all day getting it just right, and fortunately for us we have guys that can point that stuff out. It seems like really have to look at a large sample before you can start picking out the good form the bad, or correct from re-stamp. There are some talented re-stampers out there thats for sure  Undecided
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1969 garnet red Z/28 46k mile unrestored X77
Looking for 3192477 (front) spiral shocks 3192851 (rear) please
Looking for an original LOF soft ray windshield
Looking for original Delco side post negative battery cable part # 6297651AV
Edgemontvillage
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« Reply #13 on: November 03, 2013, 12:49:19 PM »

Thanks for the input. I'm looking for constructive input on the the "7". Does anyone have an original with the same digit / character shape?

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Lloyd
1969 RS Z/28 10 10 Preservation
rszmjt
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« Reply #14 on: November 03, 2013, 03:19:22 PM »

Here is my 9-E-23, still has the CZ ink stamp, 100% ORIGINAL for sure, have owned this Z28 since 1974. Its kinda scratched up from some ham fisted morron using a pry bar to tighten the belt, it still has the dated diodes and has never been apart. The 00 is faint on it too, as well as the 7 on the stamp.
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