What are the differences between an OM-10 and an OM-10 Quartz?
The only difference is that the OM-10 Quartz has a data back which is the equivalent of a Recordata Back 3. It can record the date in Year/Month/Day (Japanese) format, or the time in Day/Hour/Minute format. The electrical connections between the data back and the camera are made with an internal cable, however, so the back cannot be detached and used on another camera. The databack only keeps dates through 2009. The data back requires 2 SR44 or LR44 batteries.