Side by side
Gruppo Gamma Vanguard Steel DatevsSeestern S446 GMT
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
16 of 29 specs differDiameter
Vanguard Steel Date42mm
S446 GMT39.5mm
Power Reserve
Vanguard Steel Date42h
S446 GMT41hh
Water Resistance
Vanguard Steel Date100m
S446 GMT100m
MSRP
Vanguard Steel Date$790
S446 GMT$299
Full specifications
Case
6 specsCategory
—
GMT
Diameter
42mm
39.5mm
Thickness
12.6mm
13mm
Lug-to-Lug
49.5mm
47mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Crystal & Dial
4 specsCrystal Shape
Flat
Domed
AR Coating
Yes
Inner
Dial Color
Forged Carbon
Cream
Lume
Super-LumiNova
None
Movement
5 specsCaliber
Miyota 9015
Seiko NH34A GMT
Beat Rate
28,800 vph
3 vph
Power Reserve
42h
41hh
Jewels
25
24
Complications
Date
GMT, Date
Pricing
1 specsMSRP
$790
$299
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