Hamilton

Open Heart Auto

Reference Number :

H32705140

Series : Jazzmaster

Retail: $1,195

(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 TakeStaring into the face of the Jazzmaster Open Heart is like peering into a tiny, mechanical galaxy. That blue aventurine dial isn't just blue; it's a deep, sparkling cosmos, with the precisely engineered components of the H-10 movement acting as orbiting constellations. The signature cutouts aren't just windows; they are deliberate invitations to witness the soul of the machine. You see the balance wheel pulsating with life, a constant, rhythmic heartbeat that ticks away with an impressive 80-hour stamina. This isn't a watch for someone who just wants to know the time. It's for the person who wants to see it, feel it, and connect with the centuries of craftsmanship that led to this moment. It’s a wink from the watchmaker, a shared secret between you and the intricate dance of gears and springs, all performing a silent, beautiful ballet on your wrist against a starlit backdrop.

DescriptionThe H32705140 model is engineered with a stainless steel case measuring 42mm in diameter and a vertical thickness of 11.44mm. It is designed to accommodate a 22mm lug width strap. The dial, a distinctive blue aventurine, is protected by a sapphire crystal treated with an anti-reflective coating to ensure maximum legibility under various lighting conditions. An open case back, also fitted with sapphire crystal, allows for an unobstructed view of the internal mechanism. The structural integrity of the case provides water resistance up to 5 bar, which is equivalent to 50 meters or 164 feet, making it suitable for daily wear and exposure to moisture. The crown and case components are manufactured to precise tolerances to maintain this level of resistance.

At the core of this timepiece operates the Caliber H-10, an automatic three-hand movement. This caliber is notable for its substantial 80-hour power reserve, a significant extension over standard automatic movements. The incorporation of a Nivachron balance spring enhances the movement's reliability and performance by providing superior resistance to magnetic fields, temperature fluctuations, and shocks. The movement's architecture, visible through the dial-side cutouts and the open case back, features intricate contrasting snail and pearled patterns, which are characteristic of the finishing applied to Hamilton's American Classic collections. The stainless steel bracelet, with reference H6054251011, tapers to a 20mm folding clasp, ensuring a secure fit on the wrist.

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