Rear Brake Proportioning Valve Under Door - Date Code Question

[KurtS]

With all due respect, then it's possible that a 06A car could have a 027-9 valve?

Possible?? Yes. Very unlikely.

Looks like we may have stumbled onto something out of the ordinary in terms of conventional date coding / car build on this particular part.

The dating is typical and predictable.
I have 120+ datapoints. Looks like the incoming batches were large (small part, easy to store), so the usage stretched over longer time periods.

[LVN 67]

The valve on my NOR 02E 67 is stamped 10-7

[R68GTO]

My 09D of 1969 has a 155 dated valve.

[Hans L]

My LA car is 04A, NCRS production date is April 3, 1969 and proportioning valve is dated 052-9. That's Feb 21.

My VN Car, 04B (also Cortez Silver) has the exact same date code for the proportioning valve - 052-9.   

[ric1969]

  My LA car is 02B , proportioning valve is dated 016-9

[bobs69z]

My 06A NOR 6/26 build has a 155-9 (June 4).  Same as motor.

[RonM]

Hi guys, my 07D of 68 has a date of 157-8. Hope this helps, RonM.

[Maxsg1973]

 07E, NCRS production date is August 3, 1968 and proportioning valve is dated 157-8.

[mccorry]

My 10A LA built car has a date code of 157-8 (June 5th, 1968).

[mgreenz]

Our 1968 04D LOS car has PR valve dated 85-8. March 25th.