Geneva, May 08, 2022

LOT 209

“OBSERVATORY TRIALS”

CHF 2,000 - 4,000

EUR 2,000 - 4,000 / USD 2,200 - 4,300 / HKD 16,900 - 33,700

Sold: CHF 17,500

Rare competition chronometer wristwatch movement with Guillaume balance, subsidiary seconds, for use in observatory trials. Aluminum testing case.


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Grading System
Grade: AA

Very good
Movement: 2*

Very good

Overhaul recommended, at buyer's expense
Dial: 2-01

Very good

HANDS Original

Brand Longines, Switzerland

Model Chronometer

Year Circa 1960

Movement No. 12172995

Material Aluminum

Caliber Rectangular, 35 x 22 mm., rhodium-plated, 21 jewels, straight line lever escapement, anibal-brass Guillaume balance with special alloy Breguet balance spring, anti-shock device.

Dimensions 70 X 70 mm.

Signature Dial and movement

Notes

The watch is exceptionally well-finished, with Guillaume balance, end stones on the entire escapement and very fast train (probably 36,000 b/h). The aluminum case is typical oh those companies submitted wristwatches for the observatory contests. After WW II Longines began producing high quality wristwatches. In 1947 they won first place in Geneva Observatory Contest. The present piece continues this tradition. After the competition the company apparently kept it in its original aluminum contest case.