Side by side

Fortis Marinemaster M-40vsHamilton Jazzmaster Open Heart Auto

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

Marinemaster M-40
FortisMarinemaster M-40
MSRP $3,520
Jazzmaster Open Heart Auto
HamiltonJazzmaster Open Heart Auto
MSRP $2,695

At a glance

11 of 29 specs differ
Diameter
Marinemaster M-4040mm
Jazzmaster Open Heart Auto36mm
Power Reserve
Marinemaster M-4038h
Jazzmaster Open Heart Auto80h
Water Resistance
Marinemaster M-40300m
Jazzmaster Open Heart Auto50m
MSRP
Marinemaster M-40$3,520
Jazzmaster Open Heart Auto$2,695

Full specifications

Case

6 specs
Category
Diver
Chronograph
Diameter
40mm
36mm
Thickness
13mm
10mm
Lug-to-Lug
46mm
Lug Width
21mm
18mm
Water Resistance
300m
50m

Crystal & Dial

1 specs
Dial Color
Orange
Mother of pearl

Movement

3 specs
Caliber
Sellita SW220-1
H-10
Power Reserve
38h
80h
Jewels
26
25

Pricing

1 specs
MSRP
$3,520
$2,695

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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.

Fortis Marinemaster M-40

Owners praise the Fortis Amber Orange for its gorgeous appearance and strong wrist presence, noting its crazy lume and 70-hour power reserve. The Doxa SUB 300T, described as having a superb, eccentric design with a highly legible dial and functional no-decompression bezel, uses an ETA 2824-2 movement. However, the SUB 300T's 42.5mm case wears large and its 14mm thickness is not ideal for dress shirts, though it boasts 1,200m water resistance. On balance, owners appreciate the Fortis Amber Orange for its striking aesthetics and impressive lume.

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.

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