Side by side
A. Lange & Söhne Datograph UpdownvsHemel HFC Mechanical Chronograph
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
18 of 29 specs differDiameter
Datograph Updown41mm
HFC Mechanical Chronograph40mm
Power Reserve
Datograph Updown60h
HFC Mechanical Chronograph40h
Water Resistance
Datograph Updown30m
HFC Mechanical Chronograph100m
MSRP
Datograph Updown—
HFC Mechanical Chronograph$550
Full specifications
Case
8 specsDiameter
41mm
40mm
Thickness
13.1mm
13.4mm
Lug-to-Lug
—
47mm
Lug Width
—
20mm
Material
18kt White Gold
316L Stainless Steel
Finish
18-carat white gold | Case back: sapphire glass
Brushed and polished
Water Resistance
30m
100m
Caseback
Sapphire display
Solid
Crystal & Dial
4 specsCrystal
Sapphire
Domed Sapphire
AR Coating
—
Inner
Dial Color
Gray
Airfoil (1970s British Pilot)
Indices
—
Applied
Movement
5 specsCaliber
L951.6
Sea-Gull ST19
Beat Rate
18,000 vph
28,800 vph
Power Reserve
60h
40h
Jewels
0
25
Complications
Chronograph, Big Date, Power Reserve Indicator
None
Pricing
1 specsMSRP
—
$550
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