ProTek Watches K109x SeriesvsGrand 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.

K109x Series

SBGP015
Diameter
42mm
40mm
Lug-to-Lug
n/a
47.1mm
Thickness
13.9mm
12.4mm
lowest
Water Resistance
300m
highest
200m
MSRP
n/a
$3,800
Movement
Seiko VS2S60
Grand Seiko 9F85
Case
6 specsDiameter
42mm
40mm
Thickness
13.95mm
12.4mm
Lug-to-Lug
n/a
47.1mm
Lug Width
22mm
20mm
Material
Carbon
Stainless Steel
Water Resistance
300m
200m
Crystal & Dial
3 specsAR Coating
n/a
Yes
Dial Color
n/a
n/a
Lume
Tritium
None
Movement
2 specsCaliber
Seiko VS2S60
Grand Seiko 9F85
Power Reserve
n/a
0h
Pricing
1 specsMSRP
n/a
$3,800
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