The Dugena 989 watch movement is an open face calibre with a Breguet hairspring. The pallets and impulse pin are made of steel, and it is equipped with either 7 jewels. The specific differences between calibre 7, 570 through 573, 670, and 671 are not known. This movement is part of a series with various calibres sharing a base ranging from 15.25 through 16.5''', with only partially known details. It has a stem wind and set function, as well as a sub second. The Dugena 989 movement was commonly used around 1930.