Back in its heyday, the Valjoux 92 was one of the most in-demand chronograph movements, used by the likes of Patek Philippe, Rolex and Heuer - until quartz technology pushed this trusted calibre out of the spotlight in the late 1960s. Speake-Marin, which has made vintage movements part of its strategy, has patiently compiled a stock of these calibres which it brings back to life in the London Chronograph, a limited edition of 15 pieces. Its distinctive three-dimensional dial is set in a 42mm Piccadilly case in titanium.