Seiko Prospex x Mechanical Tuna ft. Yellow Fin Men Casual Formal Sports Round Diver 200m Water Resistant Watch SRPE87K1 SRPE87 SRPE-87 SRPE-87K1 SRP639K1 SRP639 SRP-639 SRP-639K1
Caliber Number / Movement 4R36 (automatic with manual winding capacity)
Power Reserve / Accuracy Approximately 41 hours (+45 to -35 seconds per day)
Crystal Hardlex crystal
LumiBrite Lumibrite on hands, indexes and bezel
Case & Band Material Stainless steel case with resin band
Water Resistance 200m / 660ft diver’s
Case Size Thickness: 13.8 mm Diameter: 48.0 mm Length: 50.4 mm
Other Specifications Seiko Prospex x Mechanical Tuna ft. Yellow Fin Unidirectional rotating bezel Screw-down crown Screw case back 24 jewels Day and date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)
