The Elgin 136 watch movement, introduced in 1925, has historically been recognized as one of the thinnest movements until the introduction of the Audemars Piguet 2003. It features an escapement wheel with Lubrifix 66 (later Kif Duofix) and has incorporated the Kif Ultraflex shock absorber since approximately 1985. The movement operates as a manual wind mechanism and has been utilized from 1925 onwards.