Hello, I found this Omega when I was looking through some of my fathers old things. It was among his other watches, which included an Omega Constellation '95 (1512.40). From the research that I've done so far, it is a "bumper" movement (you can feel a distinct bumping back and forth as you turn it, with about a 120* range between bumps). However, that is as much as I've been able to learn about this watch. The closest Omega that I could find that resembled this watch was the one in the first picture, which was labeled as "OMEGA 14k Gold Filled Vintage Gents Auto Bumper Watch 1951." My watch has a light gold/champagne colored dial with gold hands and a silver/stainless steel case. There are no markings on the caseback, and the watch band is an aftermarket "Speidel" replacement band. The watch has an acrylic crystal. The last three pictures are my watch. Thanks in advance to all who help!