Side by side
Alexander James Watches A4 Prelude 37 GMT Light BluevsTudor Black Bay 54
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
16 of 29 specs differDiameter
A4 Prelude 37 GMT Light Blue37.4mm
Black Bay 5437mm
Power Reserve
A4 Prelude 37 GMT Light Blue40h
Black Bay 5470h
Water Resistance
A4 Prelude 37 GMT Light Blue200m
Black Bay 54200m
MSRP
A4 Prelude 37 GMT Light Blue$325
Black Bay 54$4,725
Full specifications
Case
5 specsCategory
—
Diver
Diameter
37.4mm
37mm
Thickness
12.1mm
11.2mm
Finish
Brushed and polished
Polished + Satin
Caseback
Solid
Solid screw-down
Crystal & Dial
4 specsCrystal Shape
Flat
—
AR Coating
Inner
—
Dial Color
—
Blue
Lume
None
Super-LumiNova
Movement
6 specsCaliber
Seiko NH34
MT5400
Beat Rate
28,800 vph
0 vph
Power Reserve
40h
70h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Pricing
1 specsMSRP
$325
$4,725
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