This is about a watch I have. I have no idea how to find information on this watch, specifically when it was made. The front has the letters SR or RS (not sure) they are on top of each other and interlocking. Inside the front cover is a symbol of what appears to be a bison and the number 8039759. It appears to be gold but doesn't have the usual "14k" (or similar) reading on it The face of the watch has Zenith. Any help would be welcomed. Thanks.