Seiko Prospex

Men's 4R Compact Blue Dial Mechanical Diver Watch

The SRPL51K1 continues Seiko’s heritage of watchmaking innovation and design evolution, introducing a Prospex diver’s watch that blends two of the brand’s most recognisable designs. Drawing on the angular aesthetics of the fan-nicknamed ‘Samurai’ and ‘Shōgun’, this compact diver combines distinctive heritage styling with modernised features for a contemporary yet authentic look.

Aesthetically, the blue model adopts the steep, angular lugs of the Shōgun while echoing the crown design of the Samurai, uniting the straight contours of both blueprints. Designed for everyday comfort, the 41.7mm case offers a compact and slim profile, enhanced by refined details such as pointed hands, a practical date window at 4.5 o’clock, and a bracelet with press-formed integral links that complement the linear case design with an elegant finish.

Built to meet recognised ISO standards for professional diving watches, the SRPL51K1 offers water resistance up to 200 metres. As part of the Prospex collection—short for ‘Professional Specifications’—this timepiece is designed to be practical, reliable and durable, making it ideal for sports lovers and adventure seekers in both extreme conditions and everyday wear.

If you’re near one of our stores in Coventry or Loughborough, you’re very welcome to collect your online order in person. Simply give our customer service team a call on 0800 977 4391 and we’ll make sure everything is ready for you when you arrive.

If you’re not local, or just short on time, we offer a range of delivery options to suit you. We have partnered with DHL, DPD & Royal Mail, options include free UK delivery services on orders over £75.00, to express delivery options to most destinations worldwide. All delivery options (excluding 2nd class) are fully tracked and insured for your peace of mind.

Read our Delivery Information page (opens in new window) for a list of all delivery options.

We want you to be completely satisfied with your purchase. If for any reason you are not, you may return your order within the periods below for a full refund or exchange; T&C's apply.

Not Wanted, Wrong or Arrived Damaged
30 DAYS

Orders with Optional Insurance
14 DAYS

For full details please visit our Returns & Exchanges page (opens in new window).

We offer professional engraving on a range of items with precision and care. Whether you’re personalising a gift or adding a special message, we can help bring your idea to life.

Please visit our Engraving page for full details (opens in new window).