I picked this watch up at a yard sale. I asked if she had any watches and to my surprise she did not say i was the 5th person to ask. She said she had her Dad's and went in to get them. One was this 1949 Lexington and the other a 1940 Admiral. They were just the heads and not running. She said she wanted them to go to a good home and I promised her I would take care of them. I immediately when home and serviced this Lexington and it is now running and keeping excellent time. (+3 seconds per day). The Admiral will need a new balance and mainspring.
This appears to be a 1949 Lexington based on this 1948 ad. The case is yellow gold filled with a stainless back. Both the case and movement are marked A9. The movement is a 10BM and is 17J. The dial is champagne with yellow gold applied arabic hour numbers. The side of the case is stepped with stepped horn lugs.