This Swiss made Gruen Precision WristAlarm features 2 mainsprings, one for timekeeping, the other for the alarm. The case is stainless steel in very good condition measuring 36.2 mm w/o the crowns and 43 mm in length. The dial, hands and crystal are all in great shape and original. There are a couple of very minor scuffs on the case, but they do not take away from the great vintage look. The watch runs great and keeps good time. The alarm function also works well and is amazing loud. Much louder then the alarms in battery watches. Comes complete with a stainless steel bracelet with double safety clasp.