Side by side

Hamilton Jazzmaster Open Heart AutovsHemel HFT20

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
HFT20
HemelHFT20
MSRP $450

At a glance

11 of 29 specs differ
Diameter
Jazzmaster Open Heart Auto36mm
HFT2042mm
Power Reserve
Jazzmaster Open Heart Auto80h
HFT2040h
Water Resistance
Jazzmaster Open Heart Auto50m
HFT20100m
MSRP
Jazzmaster Open Heart Auto$2,695
HFT20$450

Full specifications

Case

6 specs
Diameter
36mm
42mm
Thickness
10mm
Lug-to-Lug
46mm
49mm
Lug Width
18mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
50m
100m

Crystal & Dial

1 specs
Dial Color
Mother of pearl
Black

Movement

3 specs
Caliber
H-10
Seiko VK64
Type
Automatic
Quartz
Power Reserve
80h
40h

Pricing

1 specs
MSRP
$2,695
$450

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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.

Hemel HFT20

The Hemel HFT20 Chronograph is praised for its legible matte black dial, sapphire crystal, and the satisfying sweep of its chronograph hand, powered by the Seiko VK64 meca-quartz movement. Reviewers note its convenient wearability, with a 42mm case that wears well due to its 49mm lug-to-lug measurement, and a comfortable, well-made leather strap. However, its 16mm thickness is considered slightly more than ideal for the movement, and the chronograph minutes sub-dial does not precisely jump. Overall, reviewers find the Hemel HFT20 to be an accessible and modern interpretation of vintage designs, offering good value at $449.

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