La Joux-Perret F100

The F100 is a manual-winding movement manufactured by La Joux-Perret. It measures 33 mm in diameter and 4.5 mm thick, operates at 3 Hz, and delivers an 8-day power reserve from a single mainspring. The movement features a small seconds subdial at 6h, a date display at 3h or 6h, and a power reserve indicator at 12h. It contains 33 jewels and does not have hacking seconds. Production has been discontinued.