This Tudor Submariner no date is reference No. 9401/0  with serial number 930745 indicating a 1980 production. The Bracelet is a Rolex 7836 folded link style with 382 end links. The watch winds sets and runs fine but have not had timing checked professionally but if wound and worn it seems to keep decent time. I am not sure of last service but I purchased it from a Rolex AD who had taken watch in as a trade.  It was the inhouse service watchmaker that installed the new snowflake hand set.  I do not have the original ones he removed.  The bi-directional bezel is somewhat stiff to rotate so probably needs to be removed cleaned under and lubricated. Please review all photos and ask any questions prior to purchase.  Thank you for your consideration.