Side by side

Spinnaker Dumas GMTvsSeiko Diamond Collection

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

Dumas GMT
SpinnakerDumas GMT
MSRP $399
Diamond Collection
SeikoDiamond Collection
MSRP $525

At a glance

11 of 29 specs differ
Diameter
Dumas GMT44mm
Diamond Collection30mm
Power Reserve
Dumas GMT40h
Diamond Collection40h
Water Resistance
Dumas GMT300m
Diamond Collection50m
MSRP
Dumas GMT$399
Diamond Collection$525

Full specifications

Case

7 specs
Category
GMT
Dress
Diameter
44mm
30mm
Thickness
15mm
6.3mm
Lug-to-Lug
48mm
36.5mm
Lug Width
22mm
5mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
300m
50m

Crystal & Dial

1 specs
Dial Color
Blue
Black

Movement

2 specs
Caliber
Seiko NH34A
7N01
Type
Automatic
Quartz

Pricing

1 specs
MSRP
$399
$525

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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.

Seiko Diamond Collection

The Seiko Diamond Collection is widely praised by owners for its stunning beauty, featuring 14 diamonds, a mother-of-pearl dial, and a two-tone color scheme. Reviewers note its dial is difficult to capture in photos and that its fit and finish suggest excellent value, especially when purchased on sale. One owner describes the gold plating on the bracelet showing some fading from desk work, and its gold tone may not suit all tastes. Overall, owners rate the Seiko Diamond Collection highly for its striking aesthetics and perceived value.

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