The Fontainemelon 36 watch movement, also known as AS 1290, features a wheel located between the barrel and minute pinion, enabling the center-second wheel and barrel to be placed in the same layer. This design allows for a relatively thin base movement, considering the inclusion of a sweep second feature. Additionally, the change in barrel revolution direction necessitates the inclusion of an additional wheel in the winding gear. This movement includes functions such as manual wind, sweep second, date hand, sweep seconds, calendar, and was commonly used during the approximate period of 1950.