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1920's Swiss Vintage Large Mens Sporting / Aviator's Single Button Chronograph - 18K Gold



PRISTINE Merchandise is in “like new” condition. There are no signs of wear or any other visible imperfections.  EXCELLENT Merchandise is in exceptionally good condition with very little wear. Any imperfections are described in detail.  VERY GOOD: Merchandise is in very good condition for its age. Older items may exhibit very light patina and wear relative to the age of the product, and more contemporary items will be just short of “excellent”. GOOD: Merchandise is in good condition and typically will appear mildly to moderately used. There may be some surface scratches and/or other imperfections. Older items may exhibit patina and wear related to their age. Please review the item listing for specific details regarding condition.


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Showcased here is an original and large c. 1920's Swiss single-button chronograph in 18K gold with enamel dial. Chronograph watches were originally designed as precision instruments, serving the needs of doctor's, pilots, auto racers, and other professionals who demanded a high level of precision in their timing. Equipped with special functions to aid the wearer in the task at hand, these fine mechanisms played an integral role in their owner's lives. Three of the most utilized features on a chronograph were a special dial for timing events up to 30 minutes in duration, "telemeter" markings around the dial that made calculating the distance of sound-based phenomena such as munitions blasts and thunderclaps at a glance, and a tachometer scale for easily determining speed and distance, such as on this watch. This rare early chronograph watch is powered by an early Landeron/Hahn caliber movement. For those unfamiliar with chronographs, due to their complexity, in vintage times most brands, including respected firms like Rolex, Breitling, and Heuer, did not fully manufacture their own movements but rather purchased them from companies who specialized in making the sophisticated mechanisms. One of the well-known chronograph movement makers of the period was the the Swiss firm Landeron. Their movements are best known for powering some of Heuer's and Baume et Mercier's chronographs, as well as watches from Gallet and other Swiss watch houses. The movement on the watch is running strong and true, and the chronograph resets crisply and to a perfect zero, although their is damage to the bezel which prevents the installation of a crystal. Please see the photos. It is being sold as-is and priced accordingly.


Functions: Time, Chronograph, Subsidiary Seconds

Dial: Signed Lucien, white enamel with dauphine Arabic indexes, telemeter and tachymetre scales, outer 1/5 second markings, original, excellent condition with light hairlines and blemishes

Hands: Original, blackened steel "Breguet moons"

Movement type: Landeron/Hahn, capable of timing events up to 30 minutes in duration, 1/5 second register, crown wheel and carrying arm

Bracelet: Leather with gold tone buckle

Width between lugs: 18mm

Return Policy: 7 days from the day it is received

SKU: 21-145848
Accompanied by: Swiss Lucien
Bracelet/Strap: Leather
Country of Origin: Switzerland
Authenticity Details: Swiss Lucien
Case Dimensions (in mm): 37.5mm wide (without crown), 51mm long lug tip-to-tip
Primary Material: 18K Gold

Domestic and international shipping is by FedEx. All shipments are fully insured.

Please contact Portero Customer Care Department for a return authorization, and ship back item within 7 days of receipt. Items must be properly packaged in comparable box, and in unworn condition.