The Alpina 226 watch movement is a manual wind movement that was used from 1934 onwards. It operates at frequencies of either 18,000 or 20,160 A/h, although Gruen catalogs do not provide specific details on this. It features a bimetallic screw balance and a Breguet hairspring. The signature often or always seen on this movement is Gruen 106. There is no information available on the differences between the Gruen 1067 and 1077, but it is likely that these designations refer to different base-plate shapes, such as round corners or octagonal.