You may want to consider looking for a serial number on the mechanism if yours does not. You might utilize a magnification device . that will help you browse the serial quantity. You may have already found the serial number if you already looked for a date code on your watch. Discover the number that is serial the inner procedure.
If there are no pinpointing markings on the outside of one’s view, or you will have to take the back case off if you want to know the model number of the movement that was used in your watch.