Side by side

Spinnaker Dumas AutomaticvsTudor Black Bay One 31 S&G

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

Dumas Automatic
SpinnakerDumas Automatic
MSRP $239
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 Automatic44mm
Black Bay One 31 S&G31mm
Power Reserve
Dumas Automatic40h
Black Bay One 31 S&G50h
Water Resistance
Dumas Automatic300m
Black Bay One 31 S&G100m
MSRP
Dumas Automatic$239
Black Bay One 31 S&G$6,850

Full specifications

Case

9 specs
Category
Diver
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
SII NH35A
MT5201
Power Reserve
40h
50h

Pricing

1 specs
MSRP
$239
$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 Automatic

Owners widely praise the Spinnaker Dumas Automatic for its attractive textured blue dial, applied indices, and well-finished case, noting its comfortable wearability due to a short lug-to-lug distance. Some owners flag the use of mineral crystal instead of sapphire and a bracelet with a learning curve and loose keeper. Overall, owners rate the Spinnaker Dumas Automatic highly for its aesthetics and case finishing at its price point.

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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