Side by side

Seestern S456 GMTvsSeiko 5 Sports SKX series

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

S456 GMT
SeesternS456 GMT
MSRP $299
5 Sports SKX series
Seiko5 Sports SKX series
MSRP $495

At a glance

15 of 29 specs differ
Diameter
S456 GMT41mm
5 Sports SKX series42.5mm
Power Reserve
S456 GMT41hh
5 Sports SKX series41h
Water Resistance
S456 GMT200m
5 Sports SKX series100m
MSRP
S456 GMT$299
5 Sports SKX series$495

Full specifications

Case

7 specs
Diameter
41mm
42.5mm
Thickness
13mm
13.6mm
Lug-to-Lug
49mm
46mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed + Polished
Brushed and polished
Water Resistance
200m
100m

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
Dial Color
Sunray style, applied and Diamond cut Indices, C1 lume
Black
Lume
C1
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
Seiko NH34
4R34
Beat Rate
3 vph
28,800 vph
Power Reserve
41hh
41h
Complications
GMT
None

Pricing

1 specs
MSRP
$299
$495

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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.

Seiko 5 Sports SKX series

The Seiko 5 Sports SKX series is widely praised as an excellent gateway watch, offering great value with a solid build and powerful lume. Owners widely report that the NH36 movement's accuracy is a "luck of the draw," with official specs allowing up to +/-40 seconds per day, though many experience +/-5 to 10 seconds. Some owners note the lack of a screw-down crown and 100m water resistance, while others highlight its ISO 6425 compliance, 200m water resistance, and screw-down crown as superior tool watch features. Some owners find the original SKX models heavier and bulkier than newer lines, while others praise its iconic, tough, and rugged dive watch design and proven durability. On balance, owners and reviewers rate the Seiko 5 Sports SKX series highly for its iconic, durable dive watch design and strong value proposition.

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