Side by side

Spinnaker Dumas GMTvsTudor Black Bay One 31 S&G

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

Dumas GMT
SpinnakerDumas GMT
MSRP $399
Black Bay One 31 S&G
TudorBlack Bay One 31 S&G
MSRP $6,850

At a glance

13 of 29 specs differ
Diameter
Dumas GMT44mm
Black Bay One 31 S&G31mm
Power Reserve
Dumas GMT40h
Black Bay One 31 S&G50h
Water Resistance
Dumas GMT300m
Black Bay One 31 S&G100m
MSRP
Dumas GMT$399
Black Bay One 31 S&G$6,850

Full specifications

Case

9 specs
Category
GMT
Diameter
44mm
31mm
Thickness
15mm
9.5mm
Lug-to-Lug
48mm
46mm
Lug Width
22mm
17mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
Polished + Satin
Water Resistance
300m
100m
Caseback
Solid
Solid screw-down

Crystal & Dial

1 specs
Dial Color
Blue
Black

Movement

2 specs
Caliber
Seiko NH34A
MT5201
Power Reserve
40h
50h

Pricing

1 specs
MSRP
$399
$6,850

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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.

Tudor Black Bay One 31 S&G

The Tudor Black Bay One 31 S&G is praised for its quiet luxury, combining brushed steel and warm gold accents for understated charm. Owners appreciate the brushed gold for a casual two-tone look and the champagne dial's surprising legibility. Some find the case sides too thick, and one user expressed a desire for a smaller S&G variant. The watch features the MT5612 movement with a 70-hour power reserve and a date function, within a 200-meter water-resistant case. Overall, owners and reviewers highlight the Tudor Black Bay One 31 S&G's balanced two-tone aesthetic as its primary appeal.

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