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Original 1940 Antique Vintage Gruen Curvex Precision Men's Wrist Watch 10k:
$699.00
As best I can tell this is an all original 1941 Gruen Curvex which there’s a large number of jewelers marks for works having been completed the last one being 8-24-75.
The jeweler markings and there are from 1973, 84, 88, 02 and the last one being 8/24/75. There may have been work after this, but I don’t know.
The serial number 369967 dates to 1941 per a Gruen watch serial number website.