The SRPE77K1 is a Seiko 5 Sports automatic with a blue dial, stainless‑steel case and bracelet mesh, unidirectional rotating bezel, day/date display, Lumibrite on hands and indexes, Hardlex crystal, screw/see‑through caseback, and 100‑meter water resistance
Case Diameter: 42.5 mm
Case Thickness: 13.4 mm
Lug‑to‑lug: 46.0 mm
Movement: Seiko Caliber 4R36 automatic; 24 jewels; approx. 41‑hour power reserve; manual winding and stop‑seconds
