The Dugena 877 watch movement, similar to the ETA 717 movement but with lower specifications, is equipped with an early Incabloc shock device. The differences between the Dugena 877 and the Zentra 295 movements are unclear. There are various samples of the Dugena 877 movement that exhibit both bridge layouts shown in the archived records. The Dugena 877 movement is a manual wind movement with sub-second functionality, and it was primarily used around the year 1935.