C.Klein. Mainz boxwood clarinet

I am offering for sale this very rare old original boxwood antique A clarinet marked probably C.Klein Mainz. The bottom key with roller suggests a slightly later year early 19th century, probably around 1880?
15 keys in total, non-original boxwood mouthpiece (unmarked) (not yet restored in good condition.) Length 675mm with mouthpiece, and 605mm without Please note that an instrument of this age will have some scratches here and there on the body. I can see evidence of cracks on the bell, and on the body but nothing major. The keys are in very good condition. Please note that there are rollers on the right bottom keys. This was a very unusual feature on such clarinets, rarely seen these days. A piece of ivory middle part is missing and on the bottom of the bell The instrument is 5-piece. I am not sure if it is Low Pitch (modern concert pitch, A = 440) …
I have not played it.
The clarinet will be carefully packaged for transport, as it is delivered without a case. Postage and price