Hamilton

Open Heart Auto

Reference Number :

H32705521

Series : Jazzmaster

Retail: $1,145

(As of: 07/2025)

This watch is not for sale, this page is just for reference purposes only. If you would like to purchase this watch, please contact Hamilton. If you are interested in selling this watch to us, you can contact us here.

Quick TakeThere's an undeniable confidence in a watch that has nothing to hide. The Jazzmaster Open Heart doesn't just tell you the time; it shares the secret of how it's done. Through the carefully executed windows on its warm beige dial, you get a constant, living view of the escapement and balance spring in action. It’s like having a tiny, intricate engine on your wrist, powered by the impressive H-10 automatic movement that promises to keep ticking for a full 80 hours even if you set it down for the weekend. The 42mm steel case provides the perfect frame for this mechanical spectacle, while the supple brown leather strap grounds the design in classic, everyday elegance. This watch is for the curious, the mechanically minded, and anyone who believes that the true beauty of an object lies in both its form and its function. It’s a masterful blend of Swiss precision and American spirit.

DescriptionThe Hamilton Jazzmaster Open Heart Auto, reference H32705521, is built upon a stainless steel case platform measuring 42mm in diameter with a total thickness of 11.44mm. Engineered for durability and daily use, its case provides water resistance up to 5 bar, which corresponds to a depth of 50 meters or 73 pounds per square inch. The dial is protected by a sapphire crystal, a material known for its high resistance to scratching, which has also been treated with an anti-reflective coating to maximize legibility by reducing glare. An exhibition-style open case back allows for visual inspection of the movement, while the lugs are spaced at a standard 22mm width to accommodate the strap. The face of the watch is a beige color, featuring intricate cutouts that expose the inner workings of the caliber beneath.

Central to its function is the Hamilton Caliber H-10, an automatic, self-winding movement. This three-hand caliber is engineered to provide an extended power reserve of 80 hours, a notable feature that enhances its practicality. The movement's design intentionally omits a date function, preserving the symmetry and focus on the open-heart display. Visible through the dial apertures and the transparent case back, the H-10 is finished with decorative snail and pearled patterns, adding a layer of aesthetic refinement. This model is paired with a brown cow leather strap (strap reference H6004251021) that secures with a 20mm-wide folding clasp made from stainless steel, ensuring a reliable and comfortable fit.

GenderMen

SignaturesHamilton

Country of OriginSwitzerland

Case Size42 mm

MovementAutomatic

CaliberH-10

FunctionsHours, Minutes, Seconds

Power Reserve80 Hours

Case MaterialsStainless Steel

Bezel MaterialsStainless Steel

Lug MaterialsStainless Steel

Case BackSapphire Crystal