Side by side

Hamilton Jazzmaster Open Heart AutovsMaen Grand Tonneau Jump Hour

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
Grand Tonneau Jump Hour
MaenGrand Tonneau Jump Hour
MSRP $999

At a glance

10 of 29 specs differ
Diameter
Jazzmaster Open Heart Auto36mm
Grand Tonneau Jump Hour34mm
Power Reserve
Jazzmaster Open Heart Auto80h
Grand Tonneau Jump Hour40h
Water Resistance
Jazzmaster Open Heart Auto50m
Grand Tonneau Jump Hour50m
MSRP
Jazzmaster Open Heart Auto$2,695
Grand Tonneau Jump Hour$999

Full specifications

Case

6 specs
Category
Chronograph
Dress
Diameter
36mm
34mm
Thickness
10mm
9.7mm
Lug-to-Lug
46mm
Lug Width
18mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

1 specs
Dial Color
Mother of pearl
MNL.01

Movement

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

Pricing

1 specs
MSRP
$2,695
$999

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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 Grand Tonneau Jump Hour

Owners widely praise the Maen Grand Tonneau Jump Hour for its unique style and accessible price point for a jump hour complication, with one owner finding the red dial variant looks and wears great. However, some find the hour and minute windows, particularly the minute window, too small and the font illegible, impacting legibility. Criticism also centers on the use of a Chinese Seagull movement in a watch priced over $1,000, leading some to label it a "fashion watch" and a "scam," while others note it is selling for significantly over its original price and is not worth it. On balance, owners are split on the Maen Grand Tonneau Jump Hour, with its unique design and value proposition countered by concerns over legibility and movement choice at its price point.

From video reviewers

The watch is praised for its ultra-thin profile and classic design. Reviewers noted the unique jumping hour complication.

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