Seiko Prospex 4R Compact Mechanical Diver’s Cobalt Blue 42mm Watch SRPL51K1

The Seiko Prospex SRPL51K1 is a refined evolution of Seiko’s celebrated Samurai diver heritage. Designed with angular aesthetics and Japanese precision, this compact diver blends bold style with everyday wearability. The 41.7 mm stainless steel case, measuring just 12.3 mm thick and ~49.5 mm lug-to-lug, offers a comfortable fit while delivering standout wrist presence. The gleaming cobalt-blue dial captures light beautifully, encircled by a unidirectional bezel and protected by scratch‑resistant Hardlex crystal with rich lume on the hands, dial, and bezel for excellent underwater visibility. The movement inside is Seiko’s durable 4R35 automatic caliber, featuring manual winding, hacking seconds, and a 41-hour power reserve. Equipped for serious adventure, this diver is ISO-compliant with 200 m water resistance, a screw-down crown & caseback, and a three-fold clasp with safety and extender for a secure fit.

UK Delivery

All orders are sent via Royal Mail Special Delivery, fully insured and requiring signature upon delivery. Free delivery on orders over £80.

International Delivery

International orders are sent via FedEx International Priority with full insurance and tracking.

Returns

Items can be returned within 14 days if unworn and in original condition. Please contact us before returning any items.

Verified by Visa / Mastercard SecureCode

Our online payments are covered by Verified by Visa and MasterCard SecureCode for your security and peace of mind.

Secure Transactions

All payments are processed through secure, encrypted payment gateways. Your financial information is never stored on our servers.