102 Armin Strom A very special and unique piece, Gravity Equal Force, automatic wristwatch in stainless steel, made for Only Watch, with grey handmade guilloché dial by Kari Voutilainen, box and papers.
Estimate: Fr. 25'000 – 50'000
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- Model Gravity Equal Force Only Watch Unique Piece
- Year 2021
- Case Material Stainless steel
- Case Number Piece Unique
- Bracelet Material Leather strap
- Movement Automatic, cal. ASB19, 28 jewels
- Dimension 41mm Diameter
- Signed Case, dial and movement
- Accessories Accompanied by Armin Strom guarantee card dated 18th January 2022, official letter by the Founder Serge Michel, booklet, travel pouch, loupe, spare parts, tools, fitted presentation box and outer packaging.
- Literature This specific watch was previously sold in Christie's Geneve "Only Watch" auction 6th November 2021, as lot 3 for CHF 38,000.
The Gravity Equal Force holds a unique place in contemporary watchmaking as the world’s first automatic wristwatch equipped with a true constant-force transmission. By regulating the energy delivered to the balance, the system ensures stable amplitude and consistent precision throughout the power reserve, an elegant and highly technical solution to one of mechanical horology’s most persistent challenges. Beyond its technical significance, the watch distinguishes itself through a design language that places mechanics firmly at the centre. The black-finished mainplate is decorated with hand-executed guilloché by Kari Voutilainen, lending the movement a level of artisanal refinement rarely encountered in contemporary automatic watches and underscoring the haute-horlogerie ambition of the project. A first for the manufacture, the off-centre grey-toned sapphire dial serves as a discreet frame rather than a traditional dial, offering an unobstructed view of the constant-force mechanism. This transparency reflects the brand’s long-standing philosophy of revealing, rather than concealing, the functional beauty of its movements. The visual identity is completed by striking orange accents: three coated brass bridges on the dial side, a matching balance bridge on the reverse, and hand-finished steel hands, all set against the dark movement architecture.
Condition Report
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LUGANO
Villa Principe Leopoldo, Via Montalbano 5
3 June - From 10:00 AM to 8:00 PM
GENEVA
Beau-Rivage, Quai du Mont-Blanc 13
9 May - From 10:00 AM to 7:00 PM
10 May - From 10:00 AM to 7:00 PM