Swiss luxury watch manufacturer Armin Strom unveiled a new version of its milestone Gravity Equal Force timepiece. The Gravity Equal Force Ultimate Sapphire with an off-center grey-toned sapphire dial will be available from October 2021 in a limited quantity of 15 pieces. Due to the limited production capacity, the special timepiece will be available subsequently in a very small number of models per year.
First launched in 2019, Armin Strom’s Gravity Equal Force is the world’s first automatic watch with constant force transmission, which results in consistent power delivery to the balance. Distinguished by its technical and aesthetic innovations the black plate guilloche pattern of the watch’s movement was created by hand by Finnish watchmaker Kari Voutilainen. The off-center grey-toned sapphire dial allows the wearer to admire the mechanics inside the case. The bridges are coated with dark grey ruthenium; the barrel and the micro-rotor are coated with rhodium.
The Gravity Equal Force’s ASB19 movement features a “stop work” mechanism that stops the mainspring from fully unwinding, thus leveraging only the part of the mainspring’s unwinding process that can deliver power most consistently. The steel hands with Super-LumiNova® filling are manufactured by Armin Strom and like all of the visible parts of the movement, are meticulously hand-finished in-house
The new Gravity Equal Force timepiece was designed and produced in-house at the brand’s manufacture in Biel. Like every Armin Strom watch, its movement has been assembled twice. After its first assembly, it was disassembled and each individual part was cleaned, dried, reassembled and lubricated before being meticulously regulated, tested, and returned to the case.
Offered in a classic 41 mm stainless-steel case, the Armin Strom Gravity Equal Force Ultimate Sapphire comes with a black fabric strap with light grey stitching.