The Tissot 2700 watch movement is a hunter calibre with an optional bimetallic screw balance. It is reasonably higher than the AM 54 movement and is to a wide extent equivalent to it. The Langendorf 1 to 160 movement generations contain calibres with different dimensions. Calibres that were no longer produced were given a new designation based on their width in whole lignes and the old generation number. The Tissot 2700 movement features the functions of stem wind and set, a sub second, and was used during the period of approximately 1925.