AJMRTC Multifunctional Mechanical Watch Movement, 12-Point Perpetual Calendar, Five-Pin 6-Point Bare Balance Wheel Movement, Precision Mechanical Core Replacement Accessories for Watch Repair & Custom

multifunctional mechanical watch core is a premium bare-balance mechanical movement tailored for watch repair and custom watch making. It features a practical 12-point perpetual calendar function, which automatically adapts to different month days and leap years without frequent manual adjustment, ensuring long-term accurate date display.

Adopting five-pin and 6-point bare balance wheel structure, the movement runs stably with uniform vibration frequency and ultra-low travel time error. The exposed balance wheel showcases exquisite mechanical aesthetics, ideal for hollow and casual mechanical watch designs.

Made of high-quality mechanical parts with fine polishing and strict calibration, it features strong durability and stable operation. It is a universal replacement accessory for old watch core replacement, watch maintenance and DIY mechanical watch modification projects.

1. Type: Multifunctional Mechanical Watch Movement
2. Core Feature: 12-Point Perpetual Calendar
3. Structure: Five-Pin, 6-Point Bare Balance Wheel
4. Operation Mode: Pure Mechanical Winding
5. Function: Time + Perpetual Calendar Display
6. Application: Watch Repair, Core Replacement, Custom DIY Watch Making