The Uwersi EUW 10.5 watch movement, which was in use around 1950, is a manually-wound movement featuring a pin-lever escapement. It incorporates a ratchet on the dial side and a crown mechanism with a rocker bar. While the differences between the 452 and 454 versions are not known, the movement offers functions such as a sub-second indicator, a date hand, a pin lever, and a calendar.