Side by side
Sheffield 1AvsTudor Black Bay GMT
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
19 of 29 specs differDiameter
1A40mm
Black Bay GMT41mm
Power Reserve
1A—
Black Bay GMT70h
Water Resistance
1A200m
Black Bay GMT200m
MSRP
1A$223
Black Bay GMT$5,275
Full specifications
Case
6 specsCategory
Diver
GMT
Diameter
40mm
41mm
Thickness
12.8mm
14.6mm
Lug Width
20mm
22mm
Finish
Brushed and polished
Polished + Satin
Caseback
Solid
Solid screw-down
Crystal & Dial
5 specsCrystal Shape
Flat
—
AR Coating
Inner
—
Dial Color
White/Blue
Black
Indices
Applied
—
Lume
Swiss blue lume
None
Movement
7 specsCaliber
Seiko NH35A
MT5652
Beat Rate
28,800 vph
0 vph
Power Reserve
—
70h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
GMT
Pricing
1 specsMSRP
$223
$5,275
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