This is the Seiko Prospex Marine Master Professional 1000 "White Dolphin" SBBN019, a limited edition of 300 pieces released in August 2010. This model, released to commemorate the 45th anniversary of Seiko divers' watches, is based on the 1000m saturation diving waterproof quartz model, which has come to be known as the "Guardian of the Deep" for its high reliability. The outer protector is made of white ceramic, which evokes the image of "white dolphins" swimming freely in the sea. This is a world-class diver's watch worthy of the name "Professional." In addition to its extreme rarity, with only 300 pieces worldwide, it is a super limited edition SEIKO watch with a unique white ceramic outer casing. It's understandable that it's traded for over 350,000 yen in the market due to its rarity. I would like to offer this item at this price. It will be first-come, first-served, so please consider it. The watch stand is for photography purposes and is not included. There are no noticeable scratches, and it is a very clean product, but since it is not new, there may be some extremely minor scratches that do not appear in the images. Please make your decision based on the images and purchase with your understanding and agreement.