Side by side
Hemel HFC Mechanical ChronographvsSeiko Astron GPS Solar 2025 Limited Edition
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
HFC Mechanical Chronograph40mm
Astron GPS Solar 2025 Limited Edition43.4mm
Power Reserve
HFC Mechanical Chronograph40h
Astron GPS Solar 2025 Limited Edition40h
Water Resistance
HFC Mechanical Chronograph100m
Astron GPS Solar 2025 Limited Edition100m
MSRP
HFC Mechanical Chronograph$550
Astron GPS Solar 2025 Limited Edition$2,900
Full specifications
Case
4 specsDiameter
40mm
43.4mm
Lug-to-Lug
47mm
49.5mm
Lug Width
20mm
14mm
Material
316L Stainless Steel
Titanium
Crystal & Dial
5 specsCrystal
Domed Sapphire
Sapphire
Crystal Shape
Flat
Curved
AR Coating
Inner
Super-clear coating
Dial Color
Airfoil (1970s British Pilot)
Black
Lume
None
LumiBrite on hands and index(es)
Movement
3 specsCaliber
Seagull ST19
5X83
Type
Manual
Quartz
Jewels
25
14
Pricing
1 specsMSRP
$550
$2,900
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