Side by side

Hamilton Jazzmaster Performer AutochronovsSpinnaker Dumas GMT

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

Jazzmaster Performer Autochrono
HamiltonJazzmaster Performer Autochrono
MSRP $2,645
Dumas GMT
SpinnakerDumas GMT
MSRP $399

At a glance

9 of 29 specs differ
Diameter
Jazzmaster Performer Autochrono42mm
Dumas GMT44mm
Power Reserve
Jazzmaster Performer Autochrono60h
Dumas GMT40h
Water Resistance
Jazzmaster Performer Autochrono100m
Dumas GMT300m
MSRP
Jazzmaster Performer Autochrono$2,645
Dumas GMT$399

Full specifications

Case

6 specs
Category
Chronograph
GMT
Diameter
42mm
44mm
Thickness
15.22mm
15mm
Lug-to-Lug
46mm
48mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
100m
300m

Movement

2 specs
Caliber
H-31
Seiko NH34A
Power Reserve
60h
40h

Pricing

1 specs
MSRP
$2,645
$399

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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 Performer Autochrono

Owners widely praise the Hamilton Jazzmaster Performer Autochrono for its versatile design, clean no-date dial, and comfortable wearability. Reviewers note the 42mm model features dauphine hands and a tachymeter bezel, powered by the H-31 automatic chronograph movement with a 60-hour power reserve. Some owners report an 80-hour power reserve and find the watch a beautiful choice for daily wear, while others express concerns about the price point and the durability of the black bezel. Accuracy averages just over 2 seconds per day, though one owner experienced an internal issue requiring service. On balance, owners and reviewers appreciate the Hamilton Jazzmaster Performer Autochrono for its attractive styling and daily wearability, despite some reservations regarding its price and bezel durability.

Spinnaker Dumas GMT

Owners praise the Spinnaker Dumas GMT's satisfying lume, including on the crown, and good finishing, with one owner finding it wears well on a 17cm wrist. The watch features a Seiko NH34A GMT movement and a blue gradient dial. Reviewers note its 44mm diameter and 209g weight on the bracelet make it unsuitable for smaller wrists.

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