Watch Glossary

Proportional relationship between Phillips curve arc radius and hairspring wire diameter.

Graphical representation of hairspring rigidity versus frequency response across environmental conditions.

Localized material stress points created by Phillips curve directional change.

Lag effect observed in hairspring behavior when temperature increases versus decreases.

Directional control exerted by Phillips curve on hairspring final outer coil trajectory.

Editorial acknowledgment that camera angles artificially enhance or diminish wrist presence.

Editorial requirement for identical lighting setups across wrist shot comparisons.

Property of materials that absorb light and re-emit it, used in all non-radioactive watch lume

Sunken dial design resembling pie with raised outer edge, creating dimensional depth effect

Dial design using pillars or columns as hour markers

Aviation-focused watch with large readable dial, often featuring chronograph and specialized functions.

Simple strap buckle with pin through holes, classic and adjustable design

Small gear with fewer teeth, typically fixed to wheel shaft for gear meshing

Thin shaft extending from watch gears that rotates in jeweled bearings to reduce friction.

Precision polishing of watch movement pivot points to reduce friction

Small rounded points on watch components that allow smooth rotation in jeweled bearings

Rotatable star chart on watch dial showing constellations visible from any date and time.

Base structural component of the movement holding bridges, jewels, and gear pivots in place.

Dense, precious metal prized for luxury watches; highly resistant to corrosion and wear

Fine stress fractures in acrylic crystal from age and temperature fluctuations; cosmetic issue.

Portable timepiece carried in pocket, popular from 17th century until wristwatch era.

French name for Geneva Seal, Swiss quality and craftsmanship hallmark certification

Professional polishing of watch case and bracelet to remove scratches and restore shine

Mirror-polished outer ring component with high reflective shine

Case finish with a mirror-like reflective surface achieved through grinding and buffing.

High-gloss surface treatment creating mirror-like reflective appearance on watch cases and components.

High-gloss white precious metal finish with brilliant reflectivity

Reflective smooth surface with high gloss achieved through polishing

Smoothing watch surfaces to a high shine using progressively finer abrasive compounds.

Ceramic dial surface offering durability and distinctive matte aesthetic with enamel-like finish

IWC's large precision pocket watch conversion collection from 1939

Fine-tuning of movement rate to account for accuracy differences in various wearing positions.

Timekeeping variation depending on the position or orientation of the watch mechanism

Duration the watch continues running after being fully wound without additional energy input.

Display showing remaining energy stored in the mainspring, indicating when rewinding is necessary.

Second-hand timepiece sold by previous owner; may include warranty or guarantee

Fine-tuning of hairspring length to achieve desired rate.

Journalism calculation dividing visual impact by case diameter for proportionality analysis.

Journalism metric comparing visual impact on wrist against retail cost.

Iconic three-piece link design with solid center links, classic luxury appearance

Method for identifying misaligned centering rings that cause uneven case back seating pressure

Hardened steel plate in case presses that distributes uniform pressure across watch case components.

Testing watch case integrity under controlled water pressure conditions

Manufacturing process verifying watch integrity at rated depth specifications.

Hour markers screen-printed or applied to dial surface in single plane dimension

Year watch was manufactured, determined from serial number or case back markings

Radioactive element formerly used in watch lume, less hazardous than radium but still radioactive

Traditional method securing gemstones using metal fingers extending from bezel base.

Critical evaluation of case diameter to lug-to-lug ratio for visual harmony on wrist.

Custom operating system architecture optimized for minimal power consumption and haptic response

Documented history of watch ownership and service, increases value and authenticity

Documented ownership history from manufacture through current owner.

Dealer/auction term rating completeness and documentation of watch ownership history from manufacture.

Bezel with graduated scale for measuring heart rate by counting pulses over time interval

Scale for measuring heart rate by counting pulse beats

Scale used with chronograph to measure heart rate from pulse beats.

Chronograph pusher requiring repeated activation; pre-1970s design characteristic.

Smartwatch operating system architecture managing app alerts and message delivery

Qualitative assessment of chronograph pusher feedback, resistance, and click consistency

Buttons on the case side used to operate chronographs and other functions.