Side by side

Seestern S456 GMTvsLongines HYDROCONQUEST GMT

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

S456 GMT
SeesternS456 GMT
MSRP $299
HYDROCONQUEST GMT
LonginesHYDROCONQUEST GMT
MSRP $3,350

At a glance

15 of 29 specs differ
Diameter
S456 GMT41mm
HYDROCONQUEST GMT41mm
Power Reserve
S456 GMT41hh
HYDROCONQUEST GMT40h
Water Resistance
S456 GMT200m
HYDROCONQUEST GMT300m
MSRP
S456 GMT$299
HYDROCONQUEST GMT$3,350

Full specifications

Case

7 specs
Category
GMT
Diver
Thickness
13mm
12.9mm
Lug-to-Lug
49mm
49.4mm
Lug Width
20mm
21mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed + Polished
Brushed and polished
Water Resistance
200m
300m

Crystal & Dial

2 specs
Dial Color
Sunray style, applied and Diamond cut Indices, C1 lume
Green
Lume
C1
None

Movement

5 specs
Caliber
Seiko NH34
L844.5
Beat Rate
3 vph
28,800 vph
Power Reserve
41hh
40h
Jewels
24
25
Complications
GMT
None

Pricing

1 specs
MSRP
$299
$3,350

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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.

Longines HYDROCONQUEST GMT

Owners widely praise the Longines HYDROCONQUEST GMT for its excellent finishing, smooth winding action, and overall value, with some finding its build quality and colorways superior to higher-priced competitors. Reviewers and owners alike note its robustness as a traveler's dive watch with a true GMT movement. Some owners find the round markers at 6 and 9 disrupt dial symmetry, and the GMT hour markers are described as tiny and difficult to read. The date wheel can be mismatched on certain dial colors, and the bracelet clasp is noted as sharp by one reviewer. While some owners wish for a smaller case size, others find the 41mm comfortable. The bezel action is flagged as having bounce-back by one owner, though the brushed finish effectively hides wear. Overall, owners and reviewers rate the Longines HYDROCONQUEST GMT highly for its robust build and excellent value proposition.

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