Side by side

Grand Seiko SLGH005vsLongines HYDROCONQUEST GMT

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

SLGH005
Grand SeikoSLGH005
MSRP $9,800
HYDROCONQUEST GMT
LonginesHYDROCONQUEST GMT
MSRP $3,350

At a glance

11 of 29 specs differ
Diameter
SLGH00540mm
HYDROCONQUEST GMT41mm
Power Reserve
SLGH00580h
HYDROCONQUEST GMT40h
Water Resistance
SLGH005100m
HYDROCONQUEST GMT300m
MSRP
SLGH005$9,800
HYDROCONQUEST GMT$3,350

Full specifications

Case

6 specs
Category
Dress
Diver
Diameter
40mm
41mm
Thickness
11.7mm
12.9mm
Lug-to-Lug
47mm
49.4mm
Lug Width
22mm
21mm
Water Resistance
100m
300m

Crystal & Dial

2 specs
AR Coating
Yes
Inner
Dial Color
Black
Green

Movement

2 specs
Caliber
9SA5
L844.5
Power Reserve
80h
40h

Pricing

1 specs
MSRP
$9,800
$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.

Grand Seiko SLGH005

The Grand Seiko SLGH005 is widely praised for its stunning "White Birch" textured dial, exceptional finishing including mirror-polished indexes and Zaratsu polishing, and the innovative Caliber 9SA5 movement. Owners and reviewers consistently highlight the dial's texture and the elaborate, mirror-like indexes. The watch's 40mm stainless steel case is noted for its slender, sporty design and comfortable wearability, with some finding its size well-proportioned and its brushed and polished surfaces practical for hiding scratches. The 9SA5 movement is recognized for its 80-hour power reserve and 36,000 vph hi-beat frequency, though one owner found its finishing less impressive than other movement types in a similar price bracket. Some reviewers consider its price somewhat high relative to alternatives and desire a micro-adjustable bracelet. On balance, owners and reviewers rate the Grand Seiko SLGH005 highly for its exquisite dial and finishing, powered by an advanced high-beat movement.

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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