Side by side
Hemel HD24 AutomaticvsTudor Black Bay GMT
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
21 of 29 specs differDiameter
HD24 Automatic40mm
Black Bay GMT41mm
Power Reserve
HD24 Automatic40h
Black Bay GMT70h
Water Resistance
HD24 Automatic200m
Black Bay GMT200m
MSRP
HD24 Automatic$300
Black Bay GMT$5,275
Full specifications
Case
8 specsCategory
Diver
GMT
Diameter
40mm
41mm
Thickness
13mm
14.6mm
Lug-to-Lug
48mm
46mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
Polished + Satin
Caseback
Solid
Solid screw-down
Crystal & Dial
5 specsCrystal
Domed Sapphire
Sapphire
Crystal Shape
Flat
—
AR Coating
Inner
—
Dial Color
Gallant USAF Edition
Black
Indices
Applied
—
Movement
7 specsCaliber
Seiko NH38A
MT5652
Beat Rate
28,800 vph
0 vph
Power Reserve
40h
70h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
GMT
Pricing
1 specsMSRP
$300
$5,275
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