I bought this vintage Rolex Oyster Precision 6421 in Hong Kong about 16 years ago from an antique shop in the Central business district and just had it authenticated by a local Rolex AD in the SF Bay Area. I haven't worn it for the past 7-8 years but it still runs fine. Looking to sell this watch to fund another purchase. Here is the watch info from the authentication and caseback:
Caliber: 1210 (17 jewels)
This manual watch...