Watch Glossary

Low-power reflective screen used in hybrid watches for extended battery life

Quick-adjust bracelet extension system allowing rapid sizing adjustment

Rolex's quick extension system allowing additional links to be added

Unfinished watch movement; semi-completed base for assembly and finishing

Unfinished watch movement blank purchased by brands for assembly and finishing

Citizen's light-powered technology using any light source to charge the watch indefinitely.

Bezel starting at zero for tracking elapsed time measurement

Integrated cardiac rhythm sensor for health monitoring in advanced smartwatches

Electrical process coating watch components with thin layers of precious metals like gold.

Porcelain-like fired coating providing smooth, durable, and lustrous finish.

Terminal links connecting the bracelet directly to the watch lugs.

Custom connection between bracelet and case lugs for improved aesthetics

Mechanical engraving technique creating intricate geometric patterns using a rose engine lathe.

Bezel with intricate geometric pattern created using engine-turning decorative technique

Robust three-piece link construction with solid links throughout, durable and masculine

Structured leather with waxy coating, rigid finish, resists water and retains shape

Moving hour hand that varies in speed to track the equation of time throughout the year.

Shows the difference between mean solar time and apparent solar time, ranging from -14 to +16 minutes.

Small pinion on escape wheel shaft that meshes with lever or pallet fork

Toothed wheel that delivers impulses to the balance wheel via pallet fork

Number of escape wheel teeth engaged per hour; defines movement speed and accuracy rating.

Mechanism that releases energy from the mainspring in precise, regulated pulses.

Energy transfer ratio from mainspring to oscillator, improved in Co-Axial and Chronergy

Close examination of escapement mechanism for wear and proper function

Toothed wheel in the escapement mechanism that interacts with the lever to release energy.

Ubiquitous workhorse movement, 38-hour reserve, automatic, reliable and affordable

Legendary chronograph movement, column wheel, 42-hour reserve, widely used by luxury brands

Generic Swiss movement manufactured by ETA SA; widely used in affordable watchmaking

Transparent or open caseback allowing view of the movement, common on mechanical and automatic watches.

Explorer II with white dial, resembling polar ice fields, reference 16570.

NATO design in woven fabric variants, breathable and casual styling option

Woven textile strap often used for sport or casual watch applications.

Bezel with worn or faded markings from decades of use and UV exposure

Aged bezel insert with significant color fading, highly prized by vintage collectors.

Soft iron inner case protecting movement from external magnetic field interference.

Directional adjustment to increase or decrease watch running rate.

Rugged military-style watch with clear dial, reliable movement, and durable construction for outdoor use.

Final decorative and protective treatment of movement and case surfaces

Wireless system uploading software patches directly to wristwatch without dock connection

Stationary bezel integrated into the case, non-rotating.

Raised inner ring on the bezel or dial used for measuring elapsed time on chronograph watches.

German military pilot watch with dial designed for excellent readability in aircraft cockpits.

Bezel with vertical grooves or ridges for enhanced grip and aesthetics

Chronograph that instantly resets and restarts with a single pusher action, without stopping first.

Chronograph reset mechanism allowing restart without returning to zero, jumping to new time.

Tourbillon cage mounted on single end, appearing to float without visible lower bridge.

Safety clasp that folds closed, providing secure and elegant fastening.

Lightweight carbon fiber composite material creating unique weave patterns in watch cases and dials.

Lightning-fast subdial hand completing a full rotation in fractions of a second for precise timing.

Brown spots or staining on dial caused by oxidation and moisture over decades

Balance wheel without a regulator index, relying solely on the hairspring for rate adjustment

Number of oscillations per hour; determines movement precision and commonly rated in Hz.

Translucent matte surface resembling frosted glass appearance

Surface treatment creating a matte, crystalline appearance on watch components.

Complete disassembly, cleaning, and reassembly of watch movement with all parts replaced

Watch sold with all original components including box, papers, warranty card, and accessories

Top leather layer retaining natural grain, develops character and patina

Smoked or translucent dial with gradient coloring from center to edges, appearing misty

Bezel with insert bonded to aluminum ring using specialized adhesive process.

Conical spool that equalizes mainspring force through variable mechanical advantage