Further to your comment, George, on your “celluloid same” thread, I have made a new post to show my new (and first) “RS” shin-gunto.
Today I closely examined the nagako under strong magnification. I wasn’t expecting find anything other than the painted characters which showed on the former owner’s pics, so I was delighted to discover a “Gifu-in-sakura” stamp! (thank you Bruce P, for your excellent article).
Whilst the blade may not be particularly interesting to many, I’m very happy to have this well-preserved example. For me these RS represent much more than what one sees at face-value :-)
I’ve attached a number of pics.
Regards to all.
Paul