Side by side
Gruppo Gamma Vanguard Steel DatevsSeestern S456 GMT
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
17 of 29 specs differDiameter
Vanguard Steel Date42mm
S456 GMT41mm
Power Reserve
Vanguard Steel Date42h
S456 GMT41hh
Water Resistance
Vanguard Steel Date100m
S456 GMT200m
MSRP
Vanguard Steel Date$790
S456 GMT$299
Full specifications
Case
8 specsCategory
—
GMT
Diameter
42mm
41mm
Thickness
12.6mm
13mm
Lug-to-Lug
49.5mm
49mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Brushed + Polished
Water Resistance
100m
200m
Crystal & Dial
3 specsAR Coating
Yes
Inner
Dial Color
Forged Carbon
Sunray style, applied and Diamond cut Indices, C1 lume
Lume
Super-LumiNova
C1
Movement
5 specsCaliber
Miyota 9015
Seiko NH34
Beat Rate
28,800 vph
3 vph
Power Reserve
42h
41hh
Jewels
25
24
Complications
Date
GMT
Pricing
1 specsMSRP
$790
$299
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