Side by side

Grand Seiko SLGA015vsYema Superman Worldtime GMT

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

SLGA015
Grand SeikoSLGA015
MSRP $12,600
Superman Worldtime GMT
YemaSuperman Worldtime GMT
MSRP $1,549

At a glance

13 of 29 specs differ
Diameter
SLGA01543.8mm
Superman Worldtime GMT39mm
Power Reserve
SLGA015120h
Superman Worldtime GMT40h
Water Resistance
SLGA015200m
Superman Worldtime GMT300m
MSRP
SLGA015$12,600
Superman Worldtime GMT$1,549

Full specifications

Case

7 specs
Category
Diver
GMT
Diameter
43.8mm
39mm
Thickness
13.8mm
Lug-to-Lug
51.5mm
Lug Width
23mm
20mm
Material
Titanium
Stainless Steel
Water Resistance
200m
300m

Crystal & Dial

2 specs
AR Coating
Yes
Inner
Dial Color
Black
39mm Automatic

Movement

3 specs
Caliber
9RA5
Type
Spring Drive
Automatic
Power Reserve
120h
40h

Pricing

1 specs
MSRP
$12,600
$1,549

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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 SLGA015

The Grand Seiko SLGA015 is widely praised for its exceptional accuracy, with owners reporting performance far exceeding the stated 10 seconds per month. The Spring Drive movement's smooth sweep and 5-day power reserve are also noted strengths, as is the lighter titanium case construction. However, some owners find the bracelet extension non-intuitive, and one noted the clasp scratched easily. The watch features a nature-inspired, wave-like dial texture. Overall, owners rate the Grand Seiko SLGA015 highly for its impressive accuracy and quality construction.

Yema Superman Worldtime GMT

Owners widely praise the Yema Superman Worldtime GMT for its premium feel, unique bezel-lock mechanism, and attractive domed crystal. Some owners note the aluminum bezel insert is less desirable than ceramic and report the bracelet clasp can be stiff or difficult to open. Inconsistent quality control and poor customer service have been flagged by some owners. On balance, owners value the Yema Superman Worldtime GMT for its distinctive features and comfortable wearability.

From video reviewers

The "Coke" bezel and maxi dial are attractive design elements. The in-house automatic GMT movement is a French alternative to pricier GMTs.

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