Thanks for the comments guys. This one has been well worn. Just a few words that the original owner emailed me after I received the watch. He was an iron worker all his life:
I wore it everyday, it has been in some amazing places . On a nuke sub we had to do a repair job , very tall buildings in Manhattan , Super clean rooms At Intel. The biggest crane in the world-we were changing out 4 540 ton steam generators . Its been on some of the biggest industrial projects in this country....I never thought of it until your email but it really does have an amazing history.
The pearl was replaced along with the crystal 10 years ago or so. I've got a tritium insert in the works and will replace the crystal since this one is not the original crystal. Hasn't been serviced since the late 80s and it's running +7 seconds a day...amazing. For the real vintage experts, answer me this. This watch has been on his wrist since new with the exception of a full service in the late 80s. The clasp code baffles me. On all of the charts I've seen, DE dates to 2000/1 but he said he has never had the clasp replaced. I have no reason to doubt his word as he has no reason to lie. Am I missing something here? The wear on the clasp matches the wear on the bracelet...they fit like puzzle pieces.