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 $475

At a glance

13 of 29 specs differ
Diameter
Dumas GMT44mm
Diamond Collection27mm
Power Reserve
Dumas GMT40h
Diamond Collection40h
Water Resistance
Dumas GMT300m
Diamond Collection50m
MSRP
Dumas GMT$399
Diamond Collection$475

Full specifications

Case

7 specs
Category
GMT
Dress
Diameter
44mm
27mm
Thickness
15mm
7.5mm
Lug-to-Lug
48mm
46mm
Lug Width
22mm
6mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
300m
50m

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
Dial Color
Blue
Black
Lume
None
LumiBrite on hands and index(es)

Movement

2 specs
Caliber
Seiko NH34A
V137
Type
Automatic
Quartz

Pricing

1 specs
MSRP
$399
$475

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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

Owners widely praise the Seiko Diamond Collection for its stunning beauty, particularly highlighting the 14 diamonds and the captivating mother-of-pearl dial, which reviewers note is difficult to photograph accurately. The watch is frequently cited as offering excellent value for its fit and finish, with specific features like sapphire crystal and 100m water resistance contributing to its appeal. One owner reports great durability and accuracy, with a solar charging reserve, though notes that the gold plating on the bracelet shows some fading from desk work. Overall, owners rate the Seiko Diamond Collection highly for its dazzling aesthetics and perceived value.

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