Seiko Prospex x Mechanical Tortoise ft. Land Series Men Casual Formal Sports Tonneau Diver 200m Water Resistant Watch SRPG18K1 SRPG18 SRPG-18 SRPG-18K1

Caliber Number / Movement
4R35 (automatic with manual winding capacity)

Power Reserve / Accuracy
Approximately 41 hours ( 45 to -35 seconds per day)

Crystal
Sapphire crystal

LumiBrite
Lumibrite on hands and indexes

Case & Band Material
Stainless steel case with calfskin leather band

Water Resistance
200m / 20 bar

Case Size
Thickness: 11.7 mm
Diameter: 42.4 mm
Length: 45.2 mm

Other Specifications
Seiko Prospex x Mechanical Tortoise ft. Land Series
Bidirectional rotating bezel
Screw-down crown
Screw case back
23 jewels
Date display
Stop second hand function (hacking mechanism)
Regular timekeeping (analog display)