Seiko Prospex Street Series \'Tuna\' Safari Edition Automatic Blue Dial Blue Silicone Strap Mens Watch SRPF81K1 The Case: The Seiko Prospex \'Tuna\' SRPF81K1 encapsulates the true essence of a tool-orientated watch, as it is defined by its unique appearance and functionality. The SRPF81K1 is made from a stainless steel and silicone. The circular case measures 43mm in diameter and its resemblance to a tuna can is why this watch is affectionally referred to as the ‘Tuna\' by Seiko fans. The case is also comprised of a stainless steel bezel with easy-to-grip edges. These knurled edges of the bezel allow the wearer to utilise the uni-directional rotating bezel easily. The bezel is bi-coloured and is stylised in an eye-catching deep blue and Champagne gold colour way.  A 60-minute scale is displayed on the bezel too, while a luminescent pip is present at the 12 o\'clock mark on it. Another characteristic of the watch that is similar to the \'Tuna\' is the protective silver shroud. On the edge of the case there is a screw down crown besides the 4 o\'clock marker, which has been positioned there to allow for maximum comfort when on the wrist.  The Dial: The ‘Tuna’ features an iridescent navy dial that consists an uncomplicated layout to allow for maximum readability. The watch appeals to the conventional, understated aesthetics of the tool through the adoption of bold baton-style indices and a baton-style handset. Both of which have been filled with a luminescent material, which allows the dial to be read in the dark. Additionally a subtle date window is present between the 4 o\'clock and 5 o\'clock marker. The Strap: The deep blue strap is made from silicone and it is comes in an accordion style. It is perforated which permits breathability and comfort. Silicone are water resistant and easy to maintain, which are to essential tool watch qualities. The Seiko wave logo also has been pressed into the strap. It fastens securely through the use of a standard silver buckle. The Functions: The SRPF81K1 uses a premium automatic 4R35 movement that offers 41 hours power reserve and an accuracy of -35/+45 seconds per day. The watch is water-resistant to 200 metres, making it the ideal companion for technical expeditions deep into the big blue. If you have any questions please click here Click here to join our facebook and Instagram !