Side by side

Spinnaker Bradner GMTvsTudor Black Bay One 31

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

Bradner GMT
SpinnakerBradner GMT
MSRP $299
Black Bay One 31
TudorBlack Bay One 31
MSRP $4,600

At a glance

13 of 29 specs differ
Diameter
Bradner GMT42mm
Black Bay One 3131mm
Power Reserve
Bradner GMT40h
Black Bay One 3150h
Water Resistance
Bradner GMT180m
Black Bay One 31100m
MSRP
Bradner GMT$299
Black Bay One 31$4,600

Full specifications

Case

9 specs
Category
GMT
Diver
Diameter
42mm
31mm
Thickness
15mm
9.5mm
Lug-to-Lug
50mm
46mm
Lug Width
22mm
17mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
Polished + Satin
Water Resistance
180m
100m
Caseback
Solid
Solid screw-down

Crystal & Dial

1 specs
Dial Color
Brown
Anthracite

Movement

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

Pricing

1 specs
MSRP
$299
$4,600

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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 Bradner GMT

The Spinnaker Bradner GMT is praised for its awesome lume and comfortable wearability, with one owner noting the rubber strap is very comfortable and the beads of rice bracelet fits well on smaller wrists. Some find its 15mm thickness and bold colorway may not appeal to everyone, and one owner views it as more of a casual GMT with tool-watch styling than a diver. Overall, owners rate the Spinnaker Bradner GMT highly for its value and comfortable wearability.

Tudor Black Bay One 31

Owners widely report the Tudor Black Bay One 31's polished case and bracelet scratch easily, though its wearability under gloves and robust movement are praised. Some desire more micro-adjustment options on the clasp, and a lack of contrast between the silver dial and hands is noted. The 31mm size may be a consideration for daily wear due to its 50-hour power reserve. On balance, owners and reviewers appreciate the Tudor Black Bay One 31 for its comfortable wearability and robust movement, despite concerns about case scratching and clasp adjustability.

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