Hamilton Jazzmaster watches

The Hamilton Jazzmaster is the brand's line of dress and dress-sports watches, mostly round, from three-hand automatics to chronographs, GMTs, open-heart dials and a regulator. Hamilton began as an American company, founded in Lancaster, Pennsylvania, in 1892. It is now based in Bienne, Switzerland, and has belonged to the Swatch Group since the merger of SSIH and ASUAG in 1984.

The Viewmatic is the core three-hand automatic, at 34, 37, 40 and 44 mm. The 34 mm Jazzmaster Auto H32315152 runs on the self-winding calibre 2671 with 43 hours of reserve and takes an 18 mm strap. The 44 mm Viewmatic comes with two movements: the H32715 references use the ETA 2824-2, while the Viewmatic Auto references beginning H32755 and H42725 use Hamilton's H-10, an automatic with an 80-hour power reserve. The H42725151 takes a 22 mm strap.

The chronographs split the same way. Hamilton's H-21 is an automatic chronograph with a 60-hour reserve and a day-date display. It drives the 41 mm Maestro Auto Chrono (H32576135, 22 mm strap), the steel 42 mm Automatic Chronographs and the 46 mm Lord Hamilton Auto Chrono H32816531, which has a tachymeter bezel and takes a 24 mm strap. The Chrono Auto 7753 and gold PVD versions such as H32646595 use the ETA 7753 and show the date only, while the 44 mm Cushion Auto Chrono and Open Secret and the 45 mm Maestro Chronograph use the ETA 7750.

Around them sit the 42 mm Open Heart Auto (H32705142) on the H-10, 40 mm Open Heart models on the ETA 2824-2, the Regulator Auto with its separate hour and minute displays on the H-12 (automatic, 42 hours), and the GMT and Traveler GMT on the ETA 2893-2. The black PVD GMT H32685731 is limited to 999 pieces. The Thinline includes quartz models and a rose gold Thinline (H38545751) on the ETA 2892-A2, and the Square, Tonneau and Cushion bring other case shapes into the line.