Seiko Prospex \'Tuna\' 300m Professional Saturation Quartz Black Dial Stainless Steel Bracelet Mens Watch S23633J1 The Case: The Seiko S23633J1 is part of the Seiko Prospex line, a unique collection of sports watches reflecting the brand’s many years of expertise. Known as the Tuna, the Seiko S23633J1 has a sturdy stainless steel case measuring 47mm in diameter. With a handsome bezel, this watch can go into the larger-sized category. The small lugs help to showcase the oversized case and face of this watch. The screw-down crown at four o’clock is oversized and adds to the sporty image of this watch. The dial is protected by curved sapphire crystal, which also boosts the solidity of the Seiko S23633J1. The Dial: With a black dial, the Seiko S23633J1 definitely has a rugged feel vibe to it. This is heightened by the presence of oversized, luminescent indices, which are coated with Lumibrite along with the flamboyant indexes. The date and day window at three o’clock brings some added depth to the dial of the Seiko S23633J1. The Bracelet: The sturdy stainless steel bracelet of the Seiko S23633J1 lends the watch a sporty yet luxurious image. The blending of the robust case and band on this watch makes a perfect match.  The Functions: Using a quartz movement, the Seiko S23633J1 is a highly reliable diving watch. Water-resistant to 300 metres, this is the ideal companion for technical expeditions deep into the big blue. Throw in the day-date function and it’s clear that this is a deeply technical watch. If you have any questions please  click here Click here to join our  facebook  and  Instagram !