Side by side
Boldr BlastoisevsTudor Black Bay One 31
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
Blastoise40mm
Black Bay One 3131mm
Power Reserve
Blastoise40h
Black Bay One 3150h
Water Resistance
Blastoise200m
Black Bay One 31100m
MSRP
Blastoise$449
Black Bay One 31$4,600
Full specifications
Case
7 specsDiameter
40mm
31mm
Thickness
12mm
9.5mm
Lug-to-Lug
49.5mm
46mm
Lug Width
20mm
17mm
Finish
Brushed and polished
Polished + Satin
Water Resistance
200m
100m
Caseback
Solid
Solid screw-down
Crystal & Dial
2 specsDial Color
Blastoise
Anthracite
Lume
Super-LumiNova
None
Movement
2 specsCaliber
Seiko (SII) NH37
MT5201
Power Reserve
40h
50h
Pricing
1 specsMSRP
$449
$4,600
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