# Yoshiaki's SEIKO Obsession * Seiko Prospex Diver Outer Shell Monster Tuna Can SEIKO SRP637K1 * This is a Tuna Can model with an outer protector, part of the Monster series, which was immensely popular both domestically and internationally at one time. * It's a unique model that was repeatedly re-released due to its immense popularity. Until a few years ago, it was re-released overseas as the SRPE87K1 model. * The outer shell is a stainless steel shroud, thicker than the Marine Master. The main case appears to be built several times better. * It's an excellent model with great cost performance, so it's understandable that it was repeatedly re-released. I think it will be revived and its price will increase again. * There are almost no minor scratches from aging and use, and of course, there are no noticeable scratches on the glass. * It works without any problems in daily use. * The watch stand is for photography purposes and is not included. While there are no noticeable scratches, this is not a new product, so there may be 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.