Side by side
Sheffield 1A 38vsTudor Black Bay 58
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
14 of 29 specs differDiameter
1A 3838mm
Black Bay 5839mm
Power Reserve
1A 38—
Black Bay 5865h
Water Resistance
1A 38200m
Black Bay 58200m
MSRP
1A 38$238
Black Bay 58$5,350
Full specifications
Case
4 specsDiameter
38mm
39mm
Thickness
12.8mm
11.7mm
Finish
Brushed and polished
Polished + Satin
Caseback
Solid
Solid screw-down
Crystal & Dial
3 specsCrystal Shape
Flat
—
AR Coating
Inner
—
Dial Color
Blue
Black
Movement
6 specsCaliber
Seiko NH35
MT5400-U
Beat Rate
28,800 vph
0 vph
Power Reserve
—
65h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Pricing
1 specsMSRP
$238
$5,350
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