Seiko 5 Sports Blue Sunray Dial Automatic Men's Watch SRPD51K2
This stainless steel sports watch from the Seiko 5 collection features a 42.5mm round case with an eye-catching blue sunray dial. The unidirectional rotating bezel and Hardlex crystal protect the dial whilst maintaining clarity for daily wear. Luminous hands and hour markers ensure legibility in low light conditions. Water resistant to 100 metres, the watch handles everyday moisture without concern, whether from hand washing or rain.
The watch is powered by the Seiko 4R36 automatic movement, which beats at 21,600 vibrations per hour and offers a 41-hour power reserve. The movement contains 24 jewels and is visible through the exhibition screw-down caseback. The blue nylon strap with tang buckle provides a secure, practical fastening, whilst the 22mm lug width accommodates alternative straps if desired. At 170 grammes and 13.4mm thick, the watch sits comfortably on the wrist.
The Seiko 5 Sports SRPD51K2 is listed on WatchShopper as a men's 42.5 mm stainless steel automatic watch with a blue sunray dial, a date display, a rotating bezel, mineral glass, and 100 m water resistance. It runs on the Seiko 4R36 calibre with a 41-hour power reserve, is 13.4 mm thick, and comes on a blue nylon strap with a 22 mm lug width. On 22 October 2026 the lowest UK price was £299.00 at Watch Enclave, in stock, with free delivery and 30-day returns. That is above its 141-day tracked average of £275.50.
WatchShopper has tracked the Seiko 5 Sports Blue Sunray Dial Automatic Men's Watch SRPD51K2 across 1 UK retailer for 141 days. In that time the lowest recorded price was £252.00 at Watch Enclave on 3 June 2026, and the highest was £299.00 at Watch Enclave. The average tracked price is £275.50. At £299.00, the current best price is above its tracked average.
| Lowest tracked price | £252.00 |
|---|---|
| Highest tracked price | £299.00 |
| Average tracked price | £275.50 |
| Current best price | £299.00 |
| Tracking since | 3 June 2026 |
At £299 this watch is among the cheapest for a men's automatic watch with a 40–44 mm case: 14% of the 1,381 we track from every brand cost less. 20% of the 330 Seiko watches we track cost less than this one. This is the 24th cheapest of the 100 versions of the 5 Sports we list.
