Side by side

Hamilton Jazzmaster Seaview AutovsSpinnaker Dumas GMT

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

Jazzmaster Seaview Auto
HamiltonJazzmaster Seaview Auto
MSRP $945
Dumas GMT
SpinnakerDumas GMT
MSRP $399

At a glance

11 of 29 specs differ
Diameter
Jazzmaster Seaview Auto37mm
Dumas GMT44mm
Power Reserve
Jazzmaster Seaview Auto42h
Dumas GMT40h
Water Resistance
Jazzmaster Seaview Auto100m
Dumas GMT300m
MSRP
Jazzmaster Seaview Auto$945
Dumas GMT$399

Full specifications

Case

7 specs
Category
Dress
GMT
Diameter
37mm
44mm
Thickness
11.3mm
15mm
Lug-to-Lug
46mm
48mm
Lug Width
18mm
22mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
100m
300m

Crystal & Dial

1 specs
Dial Color
White
Blue

Movement

2 specs
Caliber
2824-2
Seiko NH34A
Power Reserve
42h
40h

Pricing

1 specs
MSRP
$945
$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 Seaview Auto

Owners widely praise the Hamilton Jazzmaster Seaview Auto for its attractive design and comfortable wearability when paired with aftermarket straps like sailcloth. Accuracy varies, with one owner reporting gains of 15 seconds per day after seven years of wear, which improved to +/- 4 seconds per day after servicing and case replacement. Another user noted finish issues after minimal wear, questioning the material quality. The Hamilton Jazzmaster Seaview Auto is available with a 45mm stainless steel case, sapphire crystal, 300m water resistance, and an ETA 2824-2 movement, with prices around $500. On balance, owners value the Hamilton Jazzmaster Seaview Auto for its aesthetic appeal and strap versatility, though material durability can be a concern for some.

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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