Hamilton

Open Heart Auto

Reference Number :

H32705121

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 TakeThere's a certain confidence that comes with wearing a watch that has nothing to hide. The Jazzmaster Open Heart doesn't just tell you the time; it shows you time being made. The warm, beige dial acts as a stage for the main performance: the rhythmic pulse of the H-10 caliber, fully visible through the artful cutouts. It’s a mechanical ballet, a constant reminder of the incredible engineering ticking away on your wrist. This isn’t a watch for the timid. It’s for the person who appreciates both classic design and mechanical transparency. The robust 42mm steel case and matching bracelet give it a substantial, dependable feel, while the 80-hour power reserve is a nod to modern practicality. You can set it down on Friday, pick it up on Monday, and the show goes on. It’s a conversation piece that speaks volumes without saying a word, blending traditional watchmaking artistry with a bold, contemporary spirit.

DescriptionThe Hamilton Jazzmaster Open Heart, reference H32705121, is constructed with a stainless steel case that measures 42mm in diameter and has a thickness of 11.44mm. This casing provides water resistance up to 5 bar, which is equivalent to 50 meters or 164 feet, making it suitable for daily wear and resistant to incidental water contact. The front of the watch is protected by a scratch-resistant sapphire crystal, ensuring a clear view of the dial. An open case back, also crafted from sapphire crystal, allows for an unobstructed view of the movement's operation from the rear. The design incorporates a 22mm lug width, which accommodates the included stainless steel bracelet, ensuring a secure and integrated fit with the case architecture.

Internally, this timepiece is powered by the Caliber H-10 automatic movement, a three-hand mechanism renowned for its extended 80-hour power reserve. This allows the watch to remain operational for over three days without being worn or manually wound. The beige dial is distinguished by its signature Open Heart design, featuring carefully executed cutouts that expose the intricate workings of the movement, specifically the balance and escapement. The watch is paired with a stainless steel strap (reference H6054251011) that fastens with a butterfly-style buckle. The buckle width is 22mm, matching the lug width to maintain a consistent and streamlined aesthetic from the case through the bracelet. The movement itself features intricate contrasting snail and pearled patterns, adding a layer of decorative finish to its technical proficiency.

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