This is a 1960s Waltham manual-winding diver's watch. It's a slightly small 35mm size, with 18mm lugs that make it easy to match with straps. The dial and hands show almost no degradation, and the bezel is smooth with few scratches. I purchased it overseas about 10 years ago. Although it hasn't been overhauled, it has been oiled and adjusted by a Japanese watch shop after purchase. The observed daily rate on a flat surface is about 1 minute slow. It's a 1960s model from a well-known existing manufacturer, and the stainless steel case model is rare. What do you think?