Vacheron Constantin Harmony watches

Vacheron Constantin introduced the Harmony collection in 2015 to mark its 260th anniversary. The watches share a cushion-shaped case modelled on a chronograph from 1928, which carried a pulsometer scale on its dial.

The chronographs carry that layout. The Harmony Chronograph (5300S/000R-B055) runs the hand-wound calibre 3300, a column-wheel monopusher with a horizontal clutch, a 45-minute counter at 3 o'clock and a power-reserve display at 6, framed by the pulsometer scale; it was made in 260 pieces in pink gold. The Harmony Tourbillon Chronograph uses calibre 3200, a variant of the same movement with a tourbillon, in 26 platinum pieces (5100S/000P-B056). Above them sits the Harmony Ultra-Thin Grande Complication Chronograph (5400S/000P-B057): a platinum split-seconds chronograph 8.4 mm thick, whose calibre 3500 is 5.2 mm thick and self-winding through a peripheral rotor. Vacheron Constantin made 10, sold through its own boutiques.

The Harmony Dual Time runs the self-winding calibre 2460DT, a twin-time-zone variant of the brand's main automatic movement. It came as a 40 mm watch in white gold (7810S/000G-B050) or pink gold (7810S/000R-B051), 625 of each, and as a 37 mm diamond-set white-gold model in 500 pieces (7805S/000G-B052). The 37 mm Harmony Chronograph Small Model (5005S/000R-B053) is the diamond-set pink-gold version, driven by calibre 1142, a movement based on the Lemania 2310.

Those launch pieces have blue numerals. Black numerals mark the other Dual Times, in 37 and 40 mm and in pink or white gold, with or without diamonds, and a pink-gold Tourbillon Chronograph (5100S/000R-B125). The range also includes a second pink-gold Harmony Chronograph (5300S/000R-B124), the 37 mm Chronograph Small Model without diamonds (5000S/000R-B139) and a 40 mm pink-gold Complete Calendar (4000S/000R-B123).