Here we have a very nice condition Canon Data Back A for A-series SLR film cameras. 

This Data Back comes with its original carrying case and is in good shape and fully functional. 

The Data Back A attaches easily to any A-series camera (such as the A-1, AE-1, AT-1, and AE-1 Program) and allows the photographer to automatically record the date or user-designated codes directly onto the film.

Data may be printed as the shooter shoots, after shooting, or can be switched off when not needed. 

One battery lasts over 8,000 exposures (using 4LR44 battery). 

It will be carefully packaged and shipped immediately.