Side by side

Spinnaker Dumas GMTvsZelos Helmsman 3

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

Dumas GMT
SpinnakerDumas GMT
MSRP $399
Helmsman 3
ZelosHelmsman 3
MSRP $529

At a glance

10 of 29 specs differ
Diameter
Dumas GMT44mm
Helmsman 340mm
Power Reserve
Dumas GMT40h
Helmsman 340h
Water Resistance
Dumas GMT300m
Helmsman 3200m
MSRP
Dumas GMT$399
Helmsman 3$529

Full specifications

Case

6 specs
Category
GMT
Diver
Diameter
44mm
40mm
Thickness
15mm
11.5mm
Lug-to-Lug
48mm
40mm
Lug Width
22mm
20mm
Water Resistance
300m
200m

Crystal & Dial

2 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
Blue
SS - Frost

Movement

1 specs
Caliber
Seiko NH34A
Miyota 9015

Pricing

1 specs
MSRP
$399
$529

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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.

Zelos Helmsman 3

Owners widely praise the Zelos Helmsman 3 for its exceptional finishing and polishing on the titanium case, with some noting it feels nicer than previous models. The unique Titanium Crystalline Dial and Damascus Titanium dial are frequently highlighted as aesthetically pleasing and head-turning features, especially considering the price point. The brushed beads of rice bracelet is described as fitting well, and the on-the-fly clasp is considered amazing. Lume is also noted as great, with lumed crowns being a positive observation. However, some owners report the watch can feel top-heavy with sharp edges, making it uncertain as a daily driver for some. The meteorite bezel is seen by one owner as not adding significant value, and the stock strap's keepers and stitching were considered to detract from the watch's appearance.

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