Canon DB-E2 Command back E2 Boxed.

The Canon Date Back DB-E2 is an accessory designed specifically for the Canon EOS-3 camera. It offers a quartz auto date imprinting function and is interchangeable with the camera back. The Date Back DB-E2 can imprint dates in five formats: Year/Month/Day, Day/Month/Year, Blank, Month/Day/Year, and Day/Month/Year. However, it can only imprint dates up to the year 2019.

LOC Film backs

SH-28-078490