This is my first post。 There are no arms or tools that can be modified by yourself、I asked the manager。 On the beautiful dial of SNK621、The SNK661 case that was for sale on the parts page。The shape of this case is very beautiful、I personally praise it as a pretty good match.。Store Manager、Thank you。 SNK621 to match the leather belt、The case is often exchanged.。For the time being I too、I matched it with my leather belt、In this dial that looks a little green、The brown belt of earth color fits.。 The direct belt metal belt fits comfortably、I think it's a nice thing about this case。It's getting hotter, so I'm looking for an affordable solid belt and want to put it on.。I want to match the engineer type、18mm is hard to find(^^; Those who know、Please teach m(_ _)m [Postscript] Engineer Breath taught by Mr. Kogamiyama in comments(Rug width 18mm)Installed! In a classic cushion case、I think the manly engineer breath fits well、What do you think? My hometown of Yokohama suddenly became hot, so、I will go with this! No、I recommend this breath! I have a narrow arm around 16 cm,、Remove all 6 frames that can be removed、The clasp was the thinnest and it was exactly。 The texture of the belt itself is enough to withstand viewing。 The clasp is a replaceable type、I think you may change to a Seiko genuine。Straight type with a mounting width of 18 mm。 Thank you very much(o´∀`o) ：Addendum from mr.tencho As a postscript for inquiries from the person himself、I received a report with the photo below.、I will add it without permission (sweat) The last mod no.102 is、From the middle of last month when it became cool、Wearing an ostrich belt、I like it and use it。It is a case with a good shape like Zenith's Defy。