Seiko 5 Sports x Automatic ft. Mid-Field Series Men Formal Round 100m Water Resistant Watch SRPJ87K1 SRPJ87 SRPJ-87 SRPJ-87K1 Discover the Seiko 5 Sports Mid-Field Collection SRPJ series, featuring classic 36mm field watches with updated 4R36 automatic movements and 100m water resistance. Perfect entry-point into mechanical watches with sophisticated design, reliable performance, and accessible pricing for new collectors. Caliber Number / Movement 4R36 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 41 hours (+45 to -35 seconds per day) Crystal Hardlex crystal (curved) Luminous LumiBrite on hands and indexes Case / Band Material Stainless steel case with leather (calfskin) band Water Resistance 100m / 10 bar Case Size Thickness: 12.5 mm Diameter: 36.4 mm Length: 44.4 mm Lug width: 18.0 mm Other Specifications Seiko 5 Sports x Automatic ft. Mid-Field Series Magnetic resistant (4,800 A/m) See-through back case Screw case back 24 jewels Day and date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)
