The Buren 8.75 watch movement is an open face calibre pocketwatch movement available in both 18.5 and 19''' sizes. It features various bridge layouts, two base plates with differing dial-feet positions, and two slightly differing setting-lever springs. The assignment of these differences to the FHF groups and the calibre FHF 2124 is only partially known. However, comparing the corresponding calibres provides an idea of their similarities. The movement functions include stem wind and set, as well as a sub-second display.