Side by side

Spinnaker Fleuss 40 AutomaticvsTudor Black Bay One 31

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

Fleuss 40 Automatic
SpinnakerFleuss 40 Automatic
MSRP $450
Black Bay One 31
TudorBlack Bay One 31
MSRP $4,600

At a glance

12 of 29 specs differ
Diameter
Fleuss 40 Automatic40mm
Black Bay One 3131mm
Power Reserve
Fleuss 40 Automatic40h
Black Bay One 3150h
Water Resistance
Fleuss 40 Automatic150m
Black Bay One 31100m
MSRP
Fleuss 40 Automatic$450
Black Bay One 31$4,600

Full specifications

Case

8 specs
Diameter
40mm
31mm
Thickness
11mm
9.5mm
Lug-to-Lug
47mm
46mm
Lug Width
20mm
17mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
Polished + Satin
Water Resistance
150m
100m
Caseback
Solid
Solid screw-down

Crystal & Dial

1 specs
Dial Color
Coral
Anthracite

Movement

2 specs
Caliber
SII NH35A
MT5201
Power Reserve
40h
50h

Pricing

1 specs
MSRP
$450
$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 Fleuss 40 Automatic

Owners find the Spinnaker Fleuss 40 Automatic a good size for smaller wrists, though one owner notes the lume is too diffuse for easy nighttime reading. The pilot-style crown is an unusual feature for a dive watch. Overall, owners value the Spinnaker Fleuss 40 Automatic for its wearability on smaller wrists.

From video reviewers

The coral red dial is a unique aesthetic. The watch is a strong contender for best-in-class under $300.

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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