Side by side

Seestern S456 GMTvsLongines HYDROCONQUEST

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

S456 GMT
SeesternS456 GMT
MSRP $299
HYDROCONQUEST
LonginesHYDROCONQUEST
MSRP $2,000

At a glance

21 of 29 specs differ
Diameter
S456 GMT41mm
HYDROCONQUEST41mm
Power Reserve
S456 GMT41hh
HYDROCONQUEST72h
Water Resistance
S456 GMT200m
HYDROCONQUEST300m
MSRP
S456 GMT$299
HYDROCONQUEST$2,000

Full specifications

Case

8 specs
Category
GMT
Diver
Thickness
13mm
11.9mm
Lug-to-Lug
49mm
53.5mm
Lug Width
20mm
21mm
Material
316L Stainless Steel
Ceramic
Finish
Brushed + Polished
Water Resistance
200m
300m
Caseback
Solid

Crystal & Dial

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

Movement

7 specs
Caliber
Seiko NH34
L888.5
Beat Rate
3 vph
0 vph
Power Reserve
41hh
72h
Jewels
24
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
GMT
None

Pricing

1 specs
MSRP
$299
$2,000

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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

Owners widely praise the Longines Hydroconquest for its attractive sunburst blue dial and accurate timekeeping, with one owner reporting a loss of only 2 seconds per day. However, the bracelet is frequently criticized for lacking micro-adjustments and having pinch-prone links, and the screw-down crown is noted as inconvenient and difficult to operate by multiple owners. Some owners also flag the bezel action as ratchety with back play, and one owner found the lugs sharp and the overall design uncomfortable, leading them to sell the watch. On balance, owners appreciate the Longines Hydroconquest's aesthetic appeal and value, despite significant reservations about its bracelet and crown usability.

From video reviewers

The bezel action is praised for its smooth and precise rotation. Lume brightness is a shared weakness, found to be somewhat lacking. Reviewers disagreed on the watch's value proposition compared to alternatives.

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