An attractive and increasingly scarce Swiss-made pocket chronograph dating from the early twentieth century, housed in a quality Dennison "Moon" gold-filled case and featuring a beautiful white enamel tachymeter dial with Roman numerals, central chronograph seconds hand and 30-minute chronograph register.
This is a genuine mechanical chronograph pocket watch fitted with a high-grade Swiss column-wheel chronograph movement, the traditional and highly regarded system used in quality chronographs before the widespread adoption of cam-operated mechanisms. The movement displays excellent finishing throughout and remains a pleasure to operate.
The watch features a tachymeter scale calibrated for quarter-mile measurements, reflecting its original purpose as a timing instrument during an era when motor racing, horse racing and sporting events increasingly relied upon accurate portable timing devices.
In May 2026 the watch underwent a comprehensive professional service, the work included complete movement inspection, cleaning, lubrication, demagnetisation, adjustment and testing. During the service a new mainspring was fitted, upper balance cap jewels were replaced and the chronograph mechanism was repaired and restored to full working order.
Following a service, the watch produced impressive timegrapher readings of approximately:
• Rate: +4 seconds per day
• Amplitude: 294°
• Beat Error: 0.1ms
These figures indicate a movement in exceptionally healthy mechanical condition for a chronograph of this age.
The enamel dial presents beautifully with crisp Roman numerals, attractive blued steel hands and an uncommon red tachymeter scale around the outer track. The Dennison "Moon" gold-filled case remains in very good condition with honest signs of age and use consistent with a watch now well over a century old.
A wonderful opportunity to acquire a fully serviced Swiss column-wheel chronograph pocket watch with excellent mechanical performance, attractive period styling and strong collector appeal.
Swiss Made quality, reflecting the traditional standards of Swiss watchmaking in precision, craftsmanship and reliability.
Technical Details
Year: c.1905–1915
Serial No: 49512
Case Serial: 414523
Calibre: Swiss Column Wheel Chronograph
Movement: Manual Wind Chronograph
Case Size: Approx. 52mm (excluding crown)
Material: Dennison Moon Gold Filled Case
Dial: White Enamel Dial with Roman Numerals and Red Tachymeter Scale
Chronograph: Central Chronograph Seconds and 30-Minute Register
Crystal: Glass
Service: Fully serviced May 2026
Extra: Service invoice included
Case Engraving: GGM
Condition: Recently serviced and running strongly. Chronograph functions operate correctly and reset as intended. The case displays light age-related wear consistent with use and age. Please refer to the photographs for a detailed assessment of condition.
