The Raketa R2628 watch movement is a hunter calibre available in 18.5 and 19''' sizes. It features various bridge layouts, two base plates with different dial-feet positions, and two slightly differing setting-lever springs. While the exact assignment of these differences to the FHF 1 to 9 groups and the calibre FHF 2126 is only partially known, comparing the corresponding calibres provides some insight. The movement groups FHF 1 to FHF 16 encompass calibres with different dimensions, and individual designations begin with FHF 22. The Raketa R2628 offers functions including stem winding and setting, sub-second display, and right setting.