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First invented for infantry soldiers, the telemeter scale measures the distance between the wearer and an event producing a flash of both light and sound.
The initial concept was straightforward: measure the distance between the source, cannon fire, and the weapon’s impact based on the speed of sound traveling through the air at approximately 360 meters per second (1,240 km/h).
The tool also proves to be invaluable during a thunderstorm, allowing the wearer to discern whether the storm is approaching or receding using the telemeter scale to measure the distance of lightning strikes. Start the chronograph when lightning flashes appear, then stop when thunder is heard.

HIGHLIGHTS
Manual-winding, Angelus caliber A5000, based on a monopousher chronograph movement developed by THA Ébauche.
42 hours of power reserve. 23 jewels. 21,600 vph (3 Hz).
37mm 18k yellow gold (3N) case with brushed and polished surfaces.
Limited-edition of 10 pieces.
MOVEMENT
• Angelus caliber A5000, hand-wound.
• Diameter: 24mm Height: 4.2mm.
• Monopusher chronograph with small seconds, 30-minute counter, and telemeter scale.
• Hours, minutes, small seconds, 30-minute counter, and chronograph.
• 21,600 vph (3 Hz) with 42 hours of power reserve.
• 23 jewels.
• Manual-winding, Angelus caliber A5000 with exemplary finishing. 3N gold finishing, circularly grained on mainplate; 3N gold finishing with Côtes de Genève and chamfering on bridges; circularly grained gear wheels; and polished screws.
Strictly Limited
• Limited edition of 10 pieces.
• Manufactured by Angelus in Switzerland.

Dial
• Domed, grained dial in matte black inspired by a vintage Angelus chronograph from William Massena's personal collection.
• Snailed subsidiary dials.
• Gold-plated hands with Super-LumiNova.
• Gold-finished, applied indexes and Arabic numerals.
• Diamond-polished thread on outer telemeter track.
Case
• Diameter 37mm, thickness: 9.25mm.
• 18k yellow gold (3N).
• Water-resistant to 30 meters.
• Exhibition caseback with sapphire crystal with anti-reflective coating.
• Individually numbered.
• Bracelet in black Saffiano leather with hand stitching. Yellow gold pin buckle.
Warranty
• Two year guarantee.

EXCEPTIONAL LINEAGE
The Angelus Chronographe Télémètre x Massena LAB is the sister watch to the Angelus Chronographe Télémètre Yellow Gold, which has been nominated for the Chronograph Watch Prize in the 2025 edition of the Grand Prix d'Horlogerie de Genève.