The Elgin 205 is a mechanical watch movement with an open face calibre. It is equipped with a stop function featuring a pillar wheel mechanism. The movement offers various functions, including a timer with intervals of 60 seconds (with an accuracy of 0.2 seconds) and a range of 30 minutes, all controlled by the pillar wheel. Additionally, an optional setting allows for a timer interval of 30 seconds (with an accuracy of 0.1 seconds) and a range of 15 minutes. The movement is stem-wound and also features a sweep second hand. It was predominantly used during the period from 1930 to 1950.