Timex A-21 Watch [1949]1940's Timex Watches 1949 Timex Watches Timex M21 Movement Brand: U.S. Time / TimexModel: A-21Caliber: M21, manual windYear: 1949 This vintage Timex watch is the model A, also available as the AS-21 with sweeping seconds. The model A would later become the Petite range of ladies and children’s watches.