Side by side

Seestern S446 GMTvsSpinnaker Dumas GMT

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

S446 GMT
SeesternS446 GMT
MSRP $299
Dumas GMT
SpinnakerDumas GMT
MSRP $399

At a glance

13 of 29 specs differ
Diameter
S446 GMT39.5mm
Dumas GMT44mm
Power Reserve
S446 GMT41hh
Dumas GMT40h
Water Resistance
S446 GMT100m
Dumas GMT300m
MSRP
S446 GMT$299
Dumas GMT$399

Full specifications

Case

5 specs
Diameter
39.5mm
44mm
Thickness
13mm
15mm
Lug-to-Lug
47mm
48mm
Lug Width
20mm
22mm
Water Resistance
100m
300m

Crystal & Dial

2 specs
Crystal Shape
Domed
Flat
Dial Color
Cream
Blue

Movement

5 specs
Caliber
Seiko NH34A GMT
Seiko NH34A
Beat Rate
3 vph
28,800 vph
Power Reserve
41hh
40h
Jewels
24
25
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$299
$399

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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.

Spinnaker Dumas GMT

Owners praise the Spinnaker Dumas GMT's satisfying lume, including on the crown, and good finishing, with one owner finding it wears well on a 17cm wrist. The watch features a Seiko NH34A GMT movement and a blue gradient dial. Reviewers note its 44mm diameter and 209g weight on the bracelet make it unsuitable for smaller wrists.

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