Side by side

Phoibos Wave Master GMTvsGrand Seiko SLGB023

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

Wave Master GMT
PhoibosWave Master GMT
MSRP $399
SLGB023
Grand SeikoSLGB023
MSRP $12,400

At a glance

12 of 29 specs differ
Diameter
Wave Master GMT39.5mm
SLGB02340.8mm
Power Reserve
Wave Master GMT40h
SLGB02372h
Water Resistance
Wave Master GMT200m
SLGB023300m
MSRP
Wave Master GMT$399
SLGB023$12,400

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
39.5mm
40.8mm
Thickness
12.7mm
12.9mm
Lug-to-Lug
46mm
48.5mm
Lug Width
20mm
21mm
Material
Stainless Steel
Titanium
Water Resistance
200m
300m

Crystal & Dial

1 specs
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
SII NH34
9RB1
Type
Automatic
Spring Drive
Power Reserve
40h
72h

Pricing

1 specs
MSRP
$399
$12,400

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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.

Phoibos Wave Master GMT

The Phoibos Wave Master GMT is widely praised for its attractive design, comfortable 20mm tapering bracelet, and wearability on a 7" wrist, with owners finding it a strong value proposition at $220. Some minor finishing flaws, such as slightly crooked markers and off-center dial numbers, are noted by one owner, while accuracy averages around 5-10 seconds over two weeks. Overall, owners rate the Phoibos Wave Master GMT highly for its distinctive design and comfortable wearability at its price point.

From video reviewers

The Wave Master GMT's notable feature is its 200M water resistance. A drawback is the rattle of the bracelet. Reviewers disagree on the watch's value, with one reviewer noting its significant weight for a 39.5mm case diameter, but the other reviewer doesn't mention any specific weaknesses or trade-offs.

Grand Seiko SLGB023

Owners and reviewers widely praise the Grand Seiko SLGB023 for its comfortable 40.8mm titanium case and the smooth winding feel of its Spring Drive 9RB1 movement. The dial's gradient blue "ushio" motif is a highlight, though some reviewers note the bezel's fully lumed scale as a missed opportunity. Enthusiasts are divided on the power reserve indicator's placement and the design of the hour and minute hands. Overall, owners and reviewers rate the Grand Seiko SLGB023 highly for its comfortable titanium case and the refined Spring Drive movement.

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