I would like to buy the SUB 300T, but considering the purchase route and maintenance after purchase, etc.(Lol) (There is no Japanese agency) I think the correct answer is Seiko MOD。 Luxury to make a diver's watch with your favorite parts composition。 Thank you to the store manager for realizing the work that you can not do yourself。 Thank you again this time。 Of course, it has been waterproofed so you can use it hard.。 Personally、I like the DLW chapter ring on the silver dial。 I'm glad I was worried about my choice。 Parts used yobokies dial、needle、Bezel、Bezel insert DLW crown、Chapter ring ARK sapphire crystal. Belt made by Bambi in the 1970s 1200 yen at that time(Lol)