to prove my serial number decoding scheme I would like you to send me movement serial numbers of Gruen watches between to be dated approx. 1939 to 1957. May be as a first test the serial numbers only, so that you can be sure I am not cheating. Later I would like to validate my findings with case serials, style numbers, model names or Catalog numbers. Don't send in lists of numbers, I may not be able to test with more than 20 to 50 numbers right now as my formula needs adjustements and verifications.
You may post the serials here or send them via PM.
Vintage Gruen Watch Discussion Forum
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