Hamilton Jazzmaster Open Heart Auto 42mm Unisex Watch Green

Ref. H32705560

The Jazzmaster line has always occupied the space between a working movement and a dressed one, and the Open Heart takes that idea literally: a cutout in the dial exposes the escapement so the seconds can be read both from the hand and from the mechanism itself. The green here is a gradient rather than a flat colour, which means it shifts under different light in a way that makes the aperture read differently at a desk than it does outside. The H-10 is Hamilton's own automatic calibre, built with a Nivachron balance spring that resists magnetic fields far better than traditional alloys — a practical advantage for anyone who wears a watch near a laptop or phone all day. Eighty hours of reserve means a watch left off Friday evening will still be running Monday morning. At 11.44mm the case sits lower than most open-worked designs at this diameter, and the 22mm brown calfskin strap gives it enough weight and texture to hold its own against a proper suit without reading as precious.

Reference

H32705560

Brand

Hamilton

Case size

42mm

Case thickness

11.44mm

Lug width

22mm

Case material

Stainless steel

Case shape

Round

Dial

Green

Crystal

Sapphire

Movement

Automatic

Calibre

H-10

Functions

Skeleton dial

Water resistance

50m

Bracelet / strap

Leather strap

Strap colour

Brown

Clasp

Buckle

Lume

Luminous

Retailer

Goldsmiths