Jazzmaster Open Heart Auto 42mm

Automatic | 42mm | H32705140
$1,295.00
In stock
Offering a glimpse of its powerful inner mechanics, the Jazzmaster Open Heart lets precision take center stage with a new 42mm dial. Featuring a captivating midnight blue dial that sparkles, this showstopping timepiece fuses the modernity of urban architecture with the infinity of the cosmos. Showcasing Hamilton's ever-evolving craftsmanship and attention to detail, the dial brings the H-10 automatic movement into the spotlight. With its 80 hour power reserve and Nivachron™ balance spring, the Jazzmaster Open Heart Auto is fitted with an intricate stainless steel bracelet. Discover our collection of dress watches.

Features

  • SELF-WINDING

    SELF-WINDING

    Wrist movements cause the inner rotor to swing, transferring energy to the mainspring, and powering your timepiece.

  • STAINLESS STEEL CASE

    STAINLESS STEEL CASE

    A highly resistant alloy composed of steel and chromium. It can be worked to resemble a precious metal. It is nearly impervious to rust, tarnish, and corrosion.

  • Sapphire Crystal

    Sapphire Crystal

    Synthetic sapphire crystal is a tough scratch-resistant material, only diamonds could leave a mark.

  • NIVACHRON™ BALANCE SPRING

    NIVACHRON™ BALANCE SPRING

    Nivachron™ is an alloy used to produce balance spring to resist magnetic fields and improve accuracy. It reduces the effects of magnets, temperature, and shocks.

  • H-10 CALIBER

    H-10 CALIBER

    A three-hand automatic movement boasting a superior power reserve of 80 hours and featuring a Nivachron™ balance spring.

  • WATER RESISTANCE

    WATER RESISTANCE

    Your timepiece is resistant up to 5 bar (50m) / 73 psi (164 ft).

  • Aventurine Dial Unveiled
    Aventurine Dial Unveiled
    Discover the brilliance of the new Jazzmaster Open Heart, now with a stunning aventurine-inspired dial.
  • Perfectly Proportioned
    Perfectly Proportioned
    Available in 36mm for Refinement and 42mm for Presence.
5/5
Overall rating | 1 reviews
So far, I really enjoy the weight of the 43mm. I have a 39mm tissot which is lighter and it’s nice to stay within similarly luxury tiers and have a different experience each day. The jazzmaster is incredible. I love the unique semi-skeleton design and it feels like a 1 of 1 even when obviously it isn’t. 5 stars all the way!
anonymous anonymous.
January 30, 2026
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