Arnold & Son Makes World’s Thinnest Tourbillon Watch

In 1762, a man by the names James Arnold opened a small workshop in London. Over the next 250 years, his small workshop would grow and become home to one of the best known watchmakers: Arnold & Son. Since it’s meager beginnings, the British based company has grown and flourished, producing a variety of complications which have stunned the world. Now they have revealed their latest accomplishment: the Ultra Thin Tourbillon Escapement, or UTTE for short.


The UTTE clocks in at a slim 8.34mm thick, making it the thinnest tourbillon in the world.


The star of Arnold & Son’s UTTE is the movement contained within the piece. The brand new caliber A&S8200 is a tourbillon movement which measures a mere 2.97mm thick and 14mm in diameter. The movement was created entirely in-house by Arnold & Son in La Chaux-de-Fonds. The minuscule movement took several years of development to create, but is well worth the wait. In addition to being the thinnest tourbillon in existence, the A&S8200 was engineered to use the same double-barrel system common in Arnold & Son timepieces. This results in a miraculously thin movement with a spectacular 80 hour power reserve.


The A&S8200 is a mechanical feat on it’s own, but overall the UTTE is an aesthetic wonder. Set into a 42mm case, the dial of this piece features a beautiful radial design, complimenting both the time display with Roman numerals and the tourbillon, which also functions as a minute indicator.


The UTTE will be available in rose gold and palladium. It will be produced in a limited edition of 50 pieces of each metal.


To learn more about Arnold & Son and the thinnest tourbillon, visit


-Written by Selena DiGiovanni

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