Seiko Prospex SPB501J1 – 1965 Heritage Diver’s PADI Special Edition

A vibrant fusion of heritage design and modern performance, the Seiko Prospex SPB501J1 celebrates the enduring connection between Seiko and the Professional Association of Diving Instructors (PADI) with a stunning emerald‑green dial inspired by light dancing beneath the ocean surface. Built for serious dive performance, this special edition diver’s watch features reliable automatic movement, robust stainless steel construction, and a comfortable bracelet with an adjustable clasp. Its 300 m water resistance and signature unidirectional bezel make it equally suited to underwater adventure and everyday style.

Specifications
Model: SPB501 / SPB501J1
Collection: Seiko Prospex 1965 Heritage Diver’s Watch (PADI Special Edition)
Movement: Automatic with manual winding — Caliber 6R55 (~72‑hour power reserve)
Accuracy: +25 to −15 seconds per day
Jewels: 24
Case Material: Stainless steel
Case Size:
- Diameter 40.0 mm
- Thickness 13.0 mm
- Lug‑to‑Lug 46.4 mm
Crystal: Curved sapphire crystal with anti‑reflective coating on inner surface
Dial: Emerald‑green with LumiBrite on hands, indices, and bezel
Bracelet: Stainless steel with three‑fold clasp, secure lock & slide adjuster
Lug Width: 20 mm
Water Resistance: 300 m / 1000 ft (diver’s standard)
Magnetic Resistance: 4,800 A/m Weight: ~174 g
Features:
- SPECIAL EDITION engraved case back
- Unidirectional rotating bezel
- Screw‑down crown and case back