Wonderful piece with fine provenance.
Great photos! I have been looking for one of these with an intact cloth RZM tag for quite some time. At one time, someone here (I think it might have been FB) posted a picture of a stack of them from someone else's collection. Eventually I'll find one!
The ones with the cloth RZM tag are dear, and the silver wire ones are more dear still, and found usually in situ, as in the case of Dr. CHM and my things.