Side by side

Seestern S446 GMTvsGruppo Gamma Field III GMT

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

S446 GMT
SeesternS446 GMT
MSRP $299
Field III GMT
Gruppo GammaField III GMT
MSRP $459

At a glance

16 of 29 specs differ
Diameter
S446 GMT39.5mm
Field III GMT40mm
Power Reserve
S446 GMT41hh
Field III GMT41h
Water Resistance
S446 GMT100m
Field III GMT200m
MSRP
S446 GMT$299
Field III GMT$459

Full specifications

Case

6 specs
Diameter
39.5mm
40mm
Thickness
13mm
14mm
Lug-to-Lug
47mm
48.5mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
100m
200m

Crystal & Dial

4 specs
Crystal Shape
Domed
Flat
AR Coating
Inner
Yes
Dial Color
Cream
Black
Lume
None
Super-LumiNova

Movement

5 specs
Caliber
Seiko NH34A GMT
Seiko Instruments NH38A
Beat Rate
3 vph
28,800 vph
Power Reserve
41hh
41h
Jewels
24
25
Complications
GMT, Date
GMT

Pricing

1 specs
MSRP
$299
$459

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Seestern S446 GMT

Owners widely praise the Seestern S446 GMT for its stunning finishing and extreme value, with a sapphire crystal and adjustable clasp. The winding action is noted as buttery smooth, and the 39.5mm case size is considered very wearable. Some owners, however, flag the lume as a weak point and one owner found the bracelet clasp lacked sufficient micro-adjustment. The Seestern S446 GMT is considered an extreme value for the dollar. Overall, owners rate the Seestern S446 GMT highly for its exceptional finishing and value proposition at its price point.

Gruppo Gamma Field III GMT

Owners praise the Gruppo Gamma Field III GMT for its look and value, with specific mentions of its sandwich dial and comfortable OEM straps. One owner notes incredible quality for the price across their Gruppo Gamma watches. The watch features a 40mm brushed stainless steel case, box sapphire crystal, and a Seiko NH34A movement with a 41-hour power reserve and stated accuracy of -20~+40 s/day. Some find the lack of a date window a drawback for a GMT, and question its differentiation from other NH34-powered watches. On balance, owners and reviewers find the Gruppo Gamma Field III GMT to be a good value with quality construction for its price point.

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