Component record · Case
Lug
VerifiedOne of a pair (or two pairs) of projections extending from a wristwatch case, drilled or notched to accept the spring bars that attach a strap or bracelet.
What it does
Provides the structural attachment points connecting the case to its strap or bracelet, and contributes significantly to a watch's proportions and wrist fit.
How it works
Lugs are typically cast or machined as an integral part of the case rather than a separate fitted component, drilled through to accept spring bars.
Lug width (the distance between the inner faces of opposing lugs) determines compatible strap sizes and is a key case specification.
Lug shape and angle (straight, downturned, or 'bombé') significantly affect how a watch sits on the wrist and is a major element of case design and period style.
Evolution
Early wristwatches often used simple wire lugs soldered to a converted pocket-watch case; integral, robust cast or machined lugs became standard as wristwatches matured into a purpose-built category through the 20th century.
Known variations
- Straight lugs
- Downturned (curved) lugs for wrist fit
- Wire lugs, characteristic of early wristwatch conversions
Identification for collectors
- The projecting arms of the case where the strap attaches, whose shape and spacing are useful dating and identification clues
Common failure modes
- Cracked or bent lugs from impact
- Worn or elongated spring-bar holes from repeated strap changes
Related photographs
No confidently matched photograph of this subject has been found yet. These photographs show a closely related record, and are not examples of the type described on this page.
Sources & references
- de Carle, D., Watch and Clock Encyclopedia
Where sources disagree, the disagreement is stated rather than resolved silently.