Lesson 02 · 5 min read
Before you can read a watch ad or hold a real conversation about horology, you need the vocabulary. Ten parts cover 95% of what you'll ever need to point at.
Interactive diagram
Explore the full skeleton, tap each part, and watch it light up gold.
Open the anatomy diagram01
The metal shell that holds everything. Common materials: stainless steel (316L or 904L), titanium, gold, platinum, ceramic. Size is measured in millimetres across the dial — 36mm is classic, 40mm is modern standard, 44mm+ reads as oversized.
02
The face. Indices (markers), hands, and any sub-dials live here. Lacquer, enamel, guilloché engraving, and meteorite are all premium dial materials. Patina (aged lume turning yellow/cream) is a feature, not a flaw, on vintage.
03
The transparent cover. Almost every luxury watch uses synthetic sapphire — second only to diamond in hardness. Acrylic (plastic) is found on vintage and military pieces and scratches easily but polishes out.
04
The mechanical heart. Open the caseback of a fine watch and you'll see hand-finished bridges, blued screws, Geneva stripes, and (on automatics) the swinging rotor. The escapement — the part that ticks — is where most innovation still happens.
Key facts