Watch Glossary
1356 horological terms explained · 1/2
Optical treatment on sapphire reducing light reflection for improved dial visibility.
Watch case constructed from non-ferrous materials or soft iron shield protecting the movement.
Unbalanced case design where elements are not mirrored, creating unique visual interest and distinctiveness.
Transparent caseback allowing view of the movement inside.
Cylindrical case wider in the middle and tapered toward the ends, resembling a wooden barrel.
Rotating or fixed ring surrounding the crystal, often used for timing or design.
Removable ring with markings or graduations on the bezel.
Gemstone held in place by metal rim surrounding its perimeter without prongs.
Crown stamped with British broad arrow mark indicating Crown-issued military timepiece.
Case finish with fine parallel lines creating a matte appearance, more subtle than polished.
Solid screw-down backs enhance water resistance versus caseback windows.
Reinforced lug connection point for integrated bracelet attachment.
Width of the watch case measured from lug to lug.
Surface treatment of the case: polished, brushed, or combination.
Raised edge around the crystal that protects it from impacts.
Metal or alloy used for the case: steel, gold, titanium, or bronze.
Central section of the watch case that houses the dial and movement, between crystal and caseback.
Vintage watchmaking technique of hand-stamping serial numbers and hallmarks directly into case metal.
Height of the watch case from caseback to crystal.
Cover plate on the back of the case, removable or fixed.
Custom text or designs etched onto the back cover of the case.
Highly scratch-resistant bezel insert made from advanced ceramic materials for durability.
Precisely engineered cavity in watch case receiving gem-set mounting cup.
Multiple small gemstones grouped together creating unified visual element.
Bezel with raised ridged edge resembling coin milling
Spring-loaded mechanism securing watch crystal to case
Case seal capability preventing internal moisture accumulation
Metallic surface on bezel insert for tactile engagement feedback
Case surface treatment following case shape contours
Outward-bulging sapphire or mineral glass cover lens
Elongated curved horn-shaped lug design for comfort
Rounded rectangular case shape with integrated lugs
Bezel that slowly rotates unintentionally due to wear; significant condition flaw.
Knob on the case used to wind the watch and adjust the time.
Non-standard crown position at the bottom of the case, reducing accidental crown bumps while worn.
Crown positioned on the left side of the case, designed for comfortable left-handed operation.
Elastomer seal preventing moisture entry through crown tube
Protective structure around the crown to prevent accidental damage.
Protective extensions or shield around the crown preventing accidental bumps and damage.
Sloped or angular sections connecting the crown to the case.
Internal stem that connects the crown to the movement.
Transparent cover protecting the dial, typically sapphire or mineral glass.
Recessed channel in case middle holding crystal edge
Beveled metal ring compressing crystal into case with precise pressure
Cushion-shaped case with curved sides and rounded corners
Rounded square case shape with softly curved corners, popular in vintage and modern watches.
Magnifying lens over date window enlarging numerals 2.5 times
Italian term for left-handed; watch with crown at 9 o'clock for left-handed wearers.
Rotating bezel with timing marks for underwater use, typically unidirectional for safety during dives.
Two gasket seals on crown and case back for improved water resistance.
Watch with crown positioned at 3 o'clock, designed to be worn on the right wrist for left-handed operation.
Hybrid watch design housing analog movement beneath integrated digital sensor layer
Transparent or open caseback allowing view of the movement, common on mechanical and automatic watches.
Soft iron inner case protecting movement from external magnetic field interference.
Stationary bezel integrated into the case, non-rotating.
Raised inner ring on the bezel or dial used for measuring elapsed time on chronograph watches.
Gem-setting method where stones sit level with surrounding metal surface.
Rare vintage crown attachment method without threads; press-fitted onto stem for waterproof seal.
Rubber or synthetic seal that creates water-resistant barriers around openings.
Ornate arrangement with central gemstone flanked by pear-shaped stones.