Lum-Tec Solar MarinevsGrand Seiko SBGP015

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Lum-Tec Solar Marine at true scale

Solar Marine

Grand Seiko SBGP015 at true scale

SBGP015

Diameter

39mm

40mm

Lug-to-Lug

43.5mm

lowest

47.1mm

Thickness

10.7mm

lowest

12.4mm

Water Resistance

300m

highest

200m

MSRP

$463

lowest

$3,800

Movement

Automatic

Grand Seiko 9F85

Case

5 specs
Diameter
39mm
40mm
Thickness
10.7mm
12.4mm
Lug-to-Lug
43.5mm
47.1mm
Material
316L Stainless Steel (DLC coated)
Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

2 specs
AR Coating
n/a
Yes
Dial Color
Steel
n/a

Movement

2 specs
Caliber
n/a
Grand Seiko 9F85
Type
Automatic
Quartz

Pricing

1 specs
MSRP
$463
$3,800
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Lum-Tec Solar Marine

Owners widely praise the Lum-Tec Solar Marine for its all-black diver design, excellent lume, and rugged, tank-like build. This 39mm watch is noted as a great smaller option, fitting a 7-inch wrist perfectly and suitable for extensive water activities. One owner cautions that the PVD coating may wear and chip within a year. On balance, owners rate the Lum-Tec Solar Marine highly for its rugged build and excellent lume in a compact dive watch package.

Grand Seiko SBGP015

Owners widely praise the Grand Seiko SBGP015 for its exceptional dial print, which casts sharp shadows under light, and its versatility, classiness, and substantial feel. The Grand Seiko 9F85 quartz movement is noted for excellent timekeeping, with one owner purchasing it as a grab-and-go option. The watch is 40mm with 200m water resistance. Overall, owners rate the Grand Seiko SBGP015 highly for its sharp dial print and reliable quartz movement.

From video reviewers

The high accuracy of the Caliber 9F85 quartz movement is a significant strength. Reviewers noted the movement's ±10 seconds per year accuracy. The limited 100-meter water resistance was cited as a potential drawback.