Important Modern & Vintage Timepieces

Geneva, May 10, 2025

LOT 572

LONGINES, SWITZERLAND, AERO ''MARINE NATIONALE'', DOUBLE SPLIT-SECONDS CHRONOGRAPH, ALUMINIUM

CHF 6,000 - 10,000

HKD 57,000 - 95,000 / USD 7,400 - 12,300 / EUR 6,500 - 10,800

A fine and rare, aluminium, manual wind siderograph made for the Marine Nationale Aeronotique Navale with centre seconds, double split-seconds recorder, 30-hour power reserve indication and stop feature. Two tone silvered dial divided into 360 degrees with outer revolving chronograph ring, inner red decimal division and up-and-down sector at 6 o'clock. Chronograph pushbutton at 2 o'clock, knob for setting 60 seconds revolving dial at 11 o'clock, winding/setting stem at 6 o'clock, stop lever at 5 o'clock.


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Grading System
Grade: AAA

Excellent
Case: 3-8

Good

Slightly scratched
Movement: 2*

Very good

Overhaul recommended, at buyer's expense
Dial: 3-01

Good

HANDS Original

Brand Longines, Switzerland

Model AERO ''MARINE NATIONALE''

Year Circa 1935

Movement No. 6425246

Case No. 6425246

Diameter 90 mm.

Caliber 21.29, 19 jewels, rhodium-plated, ''fausses-côtes'' decoration, 19 jewels, straight line lever escapement, monometallic balance, self-compensating Breguet balance spring with micrometric cam-type regulator. Split-seconds recorder with visible work.

Signature Dial, case and movement

Accessories Extract from the archives

Notes

A siderograph is an instrument combining a clock and a navigation instrument which keeps a reference time equivalent to the time at 0° Greenwich longitude. It used to be quite helpful for pilots. Longines version stemmed from the one designed in cooperation with Charles A. Lindberg around 1930.

According to the extract from the archives this siderograph was invoiced to the retailer Jules Peter (France) on December 31st, 1943.