Side by side

Seestern S446 GMTvsTudor Black Bay

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

S446 GMT
SeesternS446 GMT
MSRP $299
Black Bay
TudorBlack Bay
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.

Tudor Black Bay

Owners widely praise the Tudor Black Bay for its comfortable wearability, robust build, and vintage-inspired aesthetics, with specific mentions of its satisfying winding feel and sturdy bezel action. Reviewers highlight the 39mm Black Bay 58's comfortable size and thinness, while others note the 41mm Master Chronometer's reliable timekeeping and magnetic resistance. Some owners find the GMT hand difficult to distinguish in low light. A recurring point of contention across multiple sources is the lack of on-the-fly micro-adjustment on the bracelet, though some find aftermarket solutions adequate. One owner reported the watch losing two minutes a day after six years, requiring a service. Overall, owners and reviewers rate the Tudor Black Bay highly for its blend of vintage charm, modern robustness, and comfortable wearability.

From video reviewers

The COSC-certified accuracy of the movement is a notable strength. The 14.7mm to 14.8mm thickness is cited as a potential drawback. Reviewers are divided on whether the newer models represent a departure from the Black Bay's heritage design.

At a glance

17 of 29 specs differ
Diameter
S446 GMT39.5mm
Black Bay41mm
Power Reserve
S446 GMT41hh
Black Bay70h
Water Resistance
S446 GMT100m
Black Bay200m
MSRP
S446 GMT$299
Black Bay

Full specifications

Case

9 specs
Category
GMT
Diver
Diameter
39.5mm
41mm
Thickness
13mm
14.7mm
Lug-to-Lug
47mm
46mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
Polished + Satin
Water Resistance
100m
200m
Caseback
Solid
Engraved

Crystal & Dial

2 specs
Crystal Shape
Domed
Flat
Dial Color
Cream
Black

Movement

5 specs
Caliber
Seiko NH34A GMT
MT5602
Beat Rate
3 vph
28,800 vph
Power Reserve
41hh
70h
Jewels
24
25
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$299
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