Side by side

Seestern S456 GMTvsTudor Black Bay GMT

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

S456 GMT
SeesternS456 GMT
MSRP $299
Black Bay GMT
TudorBlack Bay GMT
MSRP $5,275

At a glance

18 of 29 specs differ
Diameter
S456 GMT41mm
Black Bay GMT41mm
Power Reserve
S456 GMT41hh
Black Bay GMT70h
Water Resistance
S456 GMT200m
Black Bay GMT200m
MSRP
S456 GMT$299
Black Bay GMT$5,275

Full specifications

Case

6 specs
Thickness
13mm
14.6mm
Lug-to-Lug
49mm
46mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed + Polished
Polished + Satin
Caseback
Solid
Solid screw-down

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Sunray style, applied and Diamond cut Indices, C1 lume
Black
Indices
Applied
Lume
C1
None

Movement

6 specs
Caliber
Seiko NH34
MT5652
Beat Rate
3 vph
0 vph
Power Reserve
41hh
70h
Jewels
24
0
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$299
$5,275

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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 S456 GMT

Owners widely praise the Seestern S456 GMT for its exceptional value and finishing that exceeds expectations, with one owner noting its accuracy surpasses that of their Seiko 5. The dial displays a pearl-like rainbow effect. Some owners would prefer a bidirectional bezel over the current unidirectional one. The Seestern S456 GMT features an NH34 movement, a 39.5mm case, sapphire crystal, and an adjustable clasp. On balance, owners rate the Seestern S456 GMT highly for its impressive finishing and value proposition at its price point.

From video reviewers

The watch features stunning, detailed finishing that is difficult to top. Reviewers did not reach a consensus on any weaknesses.

Tudor Black Bay GMT

The Tudor Black Bay GMT is widely praised for its in-house movement offering local jumping GMT functionality, its impressive case finishing, and its vintage-inspired, drop-dead good looks. Reviewers highlight its strong value and consider it a quintessential sport watch for travelers. Some enthusiasts find its 15mm thickness divisive, though beveled edges visually reduce its perceived size. Overall, reviewers rate the Tudor Black Bay GMT highly for its excellent design and travel functionality at its price point.

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