Side by side
Hemel HD24 AutomaticvsLongines ULTRA-CHRON CLASSIC
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
22 of 29 specs differDiameter
HD24 Automatic40mm
ULTRA-CHRON CLASSIC40mm
Power Reserve
HD24 Automatic40h
ULTRA-CHRON CLASSIC72h
Water Resistance
HD24 Automatic200m
ULTRA-CHRON CLASSIC30m
MSRP
HD24 Automatic$300
ULTRA-CHRON CLASSIC$4,000
Full specifications
Case
8 specsCategory
Diver
—
Thickness
13mm
10.95mm
Lug-to-Lug
48mm
47.2mm
Lug Width
20mm
21mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
—
Water Resistance
200m
30m
Caseback
Solid
Transparent case back with sapphire crystal
Crystal & Dial
6 specsCrystal
Domed Sapphire
Sapphire
Crystal Shape
Flat
—
AR Coating
Inner
Both sides
Dial Color
Gallant USAF Edition
Silver
Indices
Applied
Applied indexes
Lume
None
Super-LumiNova
Movement
7 specsCaliber
Seiko NH38A
L836.6
Beat Rate
28,800 vph
25,200 vph
Power Reserve
40h
72h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
Hours, minutes, seconds, moon phase display and date indicated by small hand at
Pricing
1 specsMSRP
$300
$4,000
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