Side by side

Hamilton Jazzmaster Open Heart AutovsMaen Skymaster 38 MKIII

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
Skymaster 38 MKIII
MaenSkymaster 38 MKIII
MSRP $1,679

At a glance

11 of 29 specs differ
Diameter
Jazzmaster Open Heart Auto36mm
Skymaster 38 MKIII38mm
Power Reserve
Jazzmaster Open Heart Auto80h
Skymaster 38 MKIII40h
Water Resistance
Jazzmaster Open Heart Auto50m
Skymaster 38 MKIII100m
MSRP
Jazzmaster Open Heart Auto$2,695
Skymaster 38 MKIII$1,679

Full specifications

Case

6 specs
Diameter
36mm
38mm
Thickness
10mm
13.4mm
Lug-to-Lug
46mm
Lug Width
18mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
50m
100m

Crystal & Dial

2 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
Mother of pearl
M6.1.1

Movement

2 specs
Caliber
H-10
Sellita SW510mb
Power Reserve
80h
40h

Pricing

1 specs
MSRP
$2,695
$1,679

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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.

Maen Skymaster 38 MKIII

The Maen Skymaster 38 MKIII is praised for its refined case, impressive fit and finish, and compact 38mm size, which offers a premium feel with a sharp, legible dial and well-executed applied markers. Reviewers note the sweet winding action and the vintage-inspired brown sunburst dial with dauphine hands and lollipop register pointers. The watch is powered by a manual-wind Sellita SW510Mb movement with a 63-hour power reserve. Accuracy figures vary, with one reviewer reporting +7 seconds per day and another stating a tolerance of +/-15 seconds per day. On balance, owners and reviewers appreciate the Maen Skymaster 38 MKIII for its refined vintage-inspired design and compact dimensions at its price point.

From video reviewers

The 38mm case size is a key strength for the Maen Skymaster 38 MKIII. Reviewers noted the excellent quality-price ratio for a Swiss-made chronograph.

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