Osmior Bal Du Temps

• Size: 43 mm x 13.8 mm
• Movement: Calibre L601SQ: Manual–winding movement, minute repeater, flying tourbillon
• Function: • Hours indication by a single central hand • Minute-repeater on two gongs for audible hours, quarters and minutes indication
• Power Reserve: approximately 90 hours
• Water Resistance: 30 m
• Dial: • Blue hour track obtained through ALD treatment with sunray finish, L.Leroy Arabic numerals in white decal, rhodium-plated hour hand (LL306/1 - platinum case)• Tourbillon bridge with Leroy's interlaced letter L, polished finish
• Caseback: sapphire crystal
• Strap/Bracelet: • Black alligator leather strap featuring large scales on the upper part and small scales on the inner lining with tone-on-tone stitching. • Round-shaped open-worked folding clasp bearing the brand's interlaced double “L”, made from materials to match the case

The new BAL DU TEMPS  features a flying tourbillon and a minute repeater. The hours, quarters and minutes are differentiated by distinct chimes, emitted when the two hammers strike the two gongs. Its 43 mm case is available in 18K 5N red gold, platinum, or grade 5 titanium. The signature “tambour” profile, recessed caseband, chamfered lugs, and sandblasted crown engraved with the Maison’s interlaced “LL” logo, reflect the brand’s deep respect for detail.

The openworked dial offers a striking view of the mechanical choreography within. At 6 o’clock, the flying tourbillon completes one full rotation per minute. The minute repeater — activated by a slide at 9 o’clock — audibly indicates the time on demand, using two gongs struck by polished hammers visible through the case back. This acoustic complication is a nod to early 19th-century tact watches created by the Maison, notably one made for Prince Emil Maximilian Leopold August of Hesse. The hour is displayed by a single hand on a sunray-finished ring with Arabic numerals, each version adopting a different colour according to the case material: silver, blue, or anthracite grey. 

Inside beats the hand-wound L610SQ calibre, developed exclusively in Geneva, with a 90-hour power reserve.

L.Leroy