ST36 Movement : The Reference Learning Caliber

The ST36 (ST3600) is a hand-wound mechanical movement widely used as a reference caliber in beginner watchmaking courses. Its large size (~36.6 mm) makes it easier to work on than a typical wristwatch movement: parts are more readable, hand movements are less cramped, and disassembly/reassembly is clearer. The layout follows the ETA / Unitas 6497 architecture. There is extensive documentation, diagrams, and tutorials online. Ideal for learning to disassemble, clean, oil, and reassemble a mechanical movement. Specifications Caliber: Sea-Gull ST36 / ST3600 (TY3600) Type: mechanical, manual wind Diameter: ~36.60 mm Height: ~4.5 mm Frequency: 21,600 vph Jewels: 17 Functions: hours, minutes, small seconds at 9 Architecture: ETA / Unitas 6497 type French stock Ships as a bare movement (no case or dial). Chronofix stock photos.