It is a request for customizing to a certain R company submariner style。Parts other than the crown were also prepared。 Replacement parts are double dome sapphire windshield clear AR Low、Submariner Type Bezel Silver Polish BZ-SS、Submariner type (black) ceramic bezel insert SBZI-SB is ARK MS、7The S-shaped engraved crown that can be used for S-series, 4R-series, and 6R-series movements is a genuine SEIKO product (we sell it for 4000 yen including tax).。 Homework talk：Working、When I suddenly look at the case、Wear is seen on the outside of the crown tube、This is dangerous、If you check the screwing condition of the crown、A situation where the crown does not make a full turn when screwed in… Even though I customized it with this、Since the case was expected to be replaced in the very near future、When I checked the crown, it was quite worn.、The crown was also renewed just before the completion in a hurry.。As a result, I managed to make two rotations.。 Please avoid frequent crown operations such as nervously adjusting the time every day! Now there are no parts as a case、It will be repaired by the manufacturer and it will cost a lot of money!