Seiko Turtle 6309-7040

Luxury Watches

Japanese. The Seiko "Turtle" (Ref. 6309-7040) is a diver’s watch produced from 1976 to 1988, famously nicknamed for its distinct cushion-shaped case that resembles the shell of a sea turtle. This ergonomic design was engineered to protect the recessed crown at 4 o'clock. The watch features a black dial with oversized luminous markers and a functional day-date complication. At its core sits the Caliber 6309A, a robust automatic movement. Historically, the Turtle solidified Seiko's reputation as a premier provider of professional-grade tool watches. Today, this vintage icon serves as the direct DNA source for Seiko’s modern Prospex lineup. On rubber strap. Without box or papers. Marked, "SN 480179".