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1676 horological terms explained · 3/3

Tachymeter BezelCase

Scale on bezel used to measure speed based on distance traveled.

Tank caseCase

Rectangular case design inspired by military tanks, featuring distinctive curved sides and lugs.

Taper SettingCase

Gemstone setting that decreases in width from stone to mounting base.

Tension SettingCase

Modern technique where gemstone appears suspended between two metal bands.

Three-piece caseCase

Case construction with separate middle, caseback, and crystal components assembled together.

Tonneau caseCase

Barrel-shaped case wider at the center and tapered at the lugs, resembling a wine barrel.

Triple SealCase

Three gasket seals providing maximum water protection on diver's watches.

Two-piece caseCase

Case design consisting of a case middle and caseback, with the crystal fitted into the middle.

Uni-directional BezelCase

Bezel rotating only counterclockwise to prevent accidental advancement.

Water ResistanceCase

Case's ability to withstand water exposure, measured in meters or ATM.