Arnold & Son

Arnold & Son takes its name from John Arnold (1736–1799), the London watchmaker who did much to make the marine chronometer practical and who helped popularise the word chronometer. The brand was revived in Switzerland in 1995 and has belonged to the Citizen group, through the movement maker La Joux-Perret, since 2012.

The catalog lists the Constant Force Tourbillon 11 in platinum, a hand-wound tourbillon with a constant-force mechanism and dead-beat seconds, limited to 11 pieces and nominated in the Tourbillon category of the 2026 Grand Prix d'Horlogerie de Genève.

For limited pieces dealers check the number on the case against the papers.