The Jaeger Lecoultre 352 watch movement, used during the period 1973-1977, features a pointed balance staff with white jewels. This movement employs a unique design where a traditional balance system is stabilized by a quartz controlled electronic circuit that provides a pulse each balance period. It is adjustable with a trim potentiometer. The M64 movement offers various functions, including a quartz controlled balance motor and a sweep second hand. Additionally, it allows for day adjustment by +/-24 hours and date adjustment by changing 22:20-24 hours. The movement also incorporates an electrical hack feature.