Side by side

Grand Seiko SLGA015vsTudor Black Bay GMT S&G

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

SLGA015
Grand SeikoSLGA015
MSRP $12,600
Black Bay GMT S&G
TudorBlack Bay GMT S&G
MSRP $5,825

At a glance

20 of 29 specs differ
Diameter
SLGA01543.8mm
Black Bay GMT S&G41mm
Power Reserve
SLGA015120h
Black Bay GMT S&G70h
Water Resistance
SLGA015200m
Black Bay GMT S&G200m
MSRP
SLGA015$12,600
Black Bay GMT S&G$5,825

Full specifications

Case

8 specs
Category
Diver
GMT
Diameter
43.8mm
41mm
Thickness
13.8mm
14.6mm
Lug-to-Lug
51.5mm
46mm
Lug Width
23mm
22mm
Material
Titanium
Stainless Steel
Finish
Brushed and polished
Polished + Satin
Caseback
Solid
Engraved

Crystal & Dial

3 specs
Crystal Shape
Flat
AR Coating
Yes
Indices
Applied

Movement

8 specs
Caliber
9RA5
MT5652
Type
Spring Drive
Automatic
Beat Rate
28,800 vph
0 vph
Power Reserve
120h
70h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
GMT

Pricing

1 specs
MSRP
$12,600
$5,825

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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.

Tudor Black Bay GMT S&G

Owners widely praise the Tudor Black Bay GMT S&G for its muted gold tone and cohesive design, with reviewers noting its value proposition around $5,000-$5,300, powered by an in-house GMT movement. Some owners find the 41mm case and weight make it feel large on the wrist, while reviewers are split on wearability and the execution of the "Root Beer" aesthetic. Concerns are raised about the aluminum bezel insert and initial wear on the gold plating at its price point, though some see the gold-capped bracelet and crown as understandable compromises. Overall, owners and reviewers rate the Tudor Black Bay GMT S&G highly for its unique aesthetic and strong value, with the cohesive design and GMT functionality being key draws.

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