Side by side

Spinnaker Dumas GMTvsZelos Helica Moonphase

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

Dumas GMT
SpinnakerDumas GMT
MSRP $399
Helica Moonphase
ZelosHelica Moonphase
MSRP $1,049

At a glance

9 of 29 specs differ
Diameter
Dumas GMT44mm
Helica Moonphase39mm
Power Reserve
Dumas GMT40h
Helica Moonphase40h
Water Resistance
Dumas GMT300m
Helica Moonphase100m
MSRP
Dumas GMT$399
Helica Moonphase$1,049

Full specifications

Case

6 specs
Category
GMT
Moonphase
Diameter
44mm
39mm
Thickness
15mm
10mm
Lug-to-Lug
48mm
39mm
Lug Width
22mm
20mm
Water Resistance
300m
100m

Crystal & Dial

1 specs
Dial Color
Blue
Meteorite

Movement

1 specs
Caliber
Seiko NH34A
Sellita SW288 Moonphase

Pricing

1 specs
MSRP
$399
$1,049

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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 Helica Moonphase

Owners widely praise the Zelos Helica Moonphase for its gorgeous aventurine dial, unique industrial-dress aesthetic, and comfortable wearability, with one owner calling it spectacular and another their favorite Zelos. The moonphase complication is frequently highlighted as beautiful, though some find the double moon distracting or the dial cluttered. A manual-wind movement combined with a screw-down crown is noted as a drawback by some, requiring adjustment and potentially feeling fragile when fully wound, while one owner reports a 43-hour power reserve. On balance, owners rate the Zelos Helica Moonphase highly for its stunning aventurine dial and unique design at its price point.

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