The ETA 837 watch movement, produced during the period of 1930-1950, is a hunter calibre movement featuring a bimetallic screw balance and a Breguet hairspring. It is unique in its stud carrier, and dial holders accessible from the back side, which allows for easy and reliable mounting of the dial without causing damage. The original size of 12''' was reduced to 11.5'''. The movement offers functions such as stem wind and set, as well as a sub second hand.