You are bidding on a Tiffany & Co., New York men's pocket watch movement. I've gotten varied opinions on the maker of this movement. The lower balance cock argues for Patek Philippe. The serial number and lever set mechanism argue for Ekegren. In either case, a fine, high grade movement in excellent condition. The serial number is 16400. Movement diameter is 43.6mm. It is running, but has not been serviced recently. These movements I am listin...g today came from a jewelry store that closed in the 1960's. I believe they are what is left from Depression-era gold case scrapping. If that is correct, they have been sitting idle and untouched since the 1930's.