Side by side

Spinnaker Dumas GMTvsTuseno Shellback

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

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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.

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.

From video reviewers

The Spinnaker Dumas GMT offers robust build quality for its price point. Reviewers noted the 300-meter water resistance.

Tuseno Shellback

The build quality is cited as a significant strength. Availability is a weakness, with stock running low.

At a glance

12 of 29 specs differ
Diameter
Dumas GMT44mm
Shellback40mm
Power Reserve
Dumas GMT
Shellback
Water Resistance
Dumas GMT300m
Shellback200m
MSRP
Dumas GMT$399
Shellback$840

Full specifications

Case

7 specs
Category
GMT
Diameter
44mm
40mm
Thickness
15mm
11.9mm
Lug-to-Lug
48mm
47mm
Lug Width
22mm
20mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

2 specs
Dial Color
Blue
Yellow
Lume
None
Super-LumiNova

Movement

2 specs
Caliber
Seiko NH34
Sellita SW200-1
Power Reserve
0h

Pricing

1 specs
MSRP
$399
$840
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