The Wristwatch Strap and the History of Lugs

Early wrist-worn timepieces, from occasional eighteenth and nineteenth-century bracelet watches for women to the trench watches of the First World War, were generally converted or purpose-built pocket-watch-style cases fitted with wire lugs — simple soldered or brazed loops through which a leather strap or a fabric-and-leather 'shrapnel guard' style strap could be threaded, often with a hinged protective grille over the crystal.

Wire lugs were a compromise: light and cheap, but weak at the solder joint and fixed in the strap options they allowed. The spring bar — a spring-loaded telescopic pin passing through the strap and seating in drilled lugs — became the universal solution because it let straps be changed without tools beyond a simple fork, and failed safely (the bar bends or ejects rather than tearing the case). Standardised lug widths made straps interchangeable across brands.

Integrated bracelets followed a parallel path. Metal bracelets existed early — expansion bands and link bracelets were sold as aftermarket fittings — but the designed-in bracelet, where the case ends flow into the bracelet's first links, became a design statement in the 1930s and after. The Gay Frères company supplied bracelets to many of the great houses, and the bracelets of certain sports models are now as collectable as the watches.

Military requirements drove standardisation. Issue watches needed straps that were cheap, replaceable and secure over a uniform; the one-piece fabric strap that passes under the case and keeps the watch on the wrist even if one spring bar fails descends from that logic. The same pattern, in leather or fabric, remains the default field-watch fitting.

For the collector, lugs and straps are dating and originality evidence. Soldered wire lugs suggest early conversion or trench-era manufacture; the shape, drilling and finishing of lugs help date a case; and a 'correct' strap or bracelet — right end links, right clasp signature, right construction for the period — adds real value, while a wrong one is the easiest thing to change and the first thing to check.

Practical care is simple but often neglected: leather straps are consumables with a life of a year or two of daily wear, spring bars should be replaced when straps are changed (they fatigue and corrode), and lug holes on gold cases wear oval over decades. When examining a watch, look at the lug undersides — wear, repair and re-soldering are all visible there and all informative.