Side by side

Hamilton Jazzmaster Open Heart AutovsZelos Hammerhead (Tantalum LE)

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Jazzmaster Open Heart Auto
HamiltonJazzmaster Open Heart Auto
MSRP $2,695
Hammerhead (Tantalum LE)
ZelosHammerhead (Tantalum LE)
MSRP $1,499

At a glance

12 of 29 specs differ
Diameter
Jazzmaster Open Heart Auto36mm
Hammerhead (Tantalum LE)44mm
Power Reserve
Jazzmaster Open Heart Auto80h
Hammerhead (Tantalum LE)40h
Water Resistance
Jazzmaster Open Heart Auto50m
Hammerhead (Tantalum LE)300m
MSRP
Jazzmaster Open Heart Auto$2,695
Hammerhead (Tantalum LE)$1,499

Full specifications

Case

7 specs
Category
Chronograph
Diver
Diameter
36mm
44mm
Thickness
10mm
13mm
Lug-to-Lug
46mm
44mm
Lug Width
18mm
22mm
Material
Stainless Steel
Titanium
Water Resistance
50m
300m

Crystal & Dial

2 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
Mother of pearl
Tantalum LE

Movement

2 specs
Caliber
H-10
Seiko NH35
Power Reserve
80h
40h

Pricing

1 specs
MSRP
$2,695
$1,499

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Hamilton Jazzmaster Open Heart Auto

The Hamilton Jazzmaster Open Heart Auto is noted for its dressy yet versatile design, featuring striking gradient dials and intricately shaped cutouts that reveal the H-10 movement. It boasts an 80-hour power reserve and Nivachron hairspring. The watch is available in 36mm, 40mm, or 42mm stainless steel cases. On balance, the Hamilton Jazzmaster Open Heart Auto is appreciated for its visually engaging dial and movement display at its price point.

From video reviewers

The smoked dial's precision cutouts offer a captivating view of the automatic movement. Legibility is compromised by the open-heart design.

Zelos Hammerhead (Tantalum LE)

The Zelos Hammerhead (Tantalum LE) features a forged carbon dial and bezel insert with infused lume. On balance, owners and reviewers rate the Zelos Hammerhead (Tantalum LE) highly for its unique material composition and substantial feel.

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