Side by side
Seestern S456 GMTvsSheffield 1A
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
14 of 29 specs differDiameter
S456 GMT41mm
1A40mm
Power Reserve
S456 GMT41hh
1A—
Water Resistance
S456 GMT200m
1A200m
MSRP
S456 GMT$299
1A$223
Full specifications
Case
6 specsCategory
GMT
Diver
Diameter
41mm
40mm
Thickness
13mm
12.8mm
Lug-to-Lug
49mm
46mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed + Polished
Brushed and polished
Crystal & Dial
2 specsDial Color
Sunray style, applied and Diamond cut Indices, C1 lume
White/Blue
Lume
C1
Swiss blue lume
Movement
5 specsCaliber
Seiko NH34
Seiko NH35A
Beat Rate
3 vph
28,800 vph
Power Reserve
41hh
—
Jewels
24
25
Complications
GMT
None
Pricing
1 specsMSRP
$299
$223
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