Recent Blogs
Stem-winding Movement Explained: Keyless Works Mechanism, Parts, and Crown-Turn Formula
Stem-winding movement explained — how the crown, clutch, and winding pinion drive a watch mainspring, with formulas, tolerances, and worked examples for watchmakers.
Fusee Chain and Spring Drum Mechanism: How It Works, Parts, Formula, and Diagram Explained
Fusee Chain and Spring Drum explained — how horologists use a tapered cone and chain to equalise mainspring torque across an 8-day run. Diagram, formulas,...
Fusee (form) Mechanism: How It Works, Parts, Diagram, and Uses in Watches and Chronometers
How a Fusee equalises mainspring torque in pocket watches and marine chronometers — geometry, formula, worked example, and selection guide for restorers.
Duplex Escapement Mechanism: How It Works, Diagram, Parts, Formula and Uses Explained
How the Duplex Escapement works in early pocket watches and Chinese market timepieces — geometry, locking, impulse, failure modes, and a worked rate calculation.
Cylinder Escapement Mechanism: How It Works, Diagram, Parts, and Uses in Pocket Watches
How the Cylinder Escapement works in pocket watches and thin movements — geometry, escape-wheel detail, failure modes, and a worked rate calculation for restorers.
Antique Watch Escapement Mechanism: How It Works, Parts, Diagram, and Beat Rate Formula
How an Antique Watch Escapement works, with formulas, beat-rate math, a worked pocket-watch example, and tradeoffs versus modern lever escapements.