Parts of an unusual instrument. Mini bassoon? octavin? , Vintage

Description

Interesting. vintage parts of an unusual instrument.
It is not complete and I have no other parts for it.
I dont know what it is exactly, it looks like a kind of mini bassoon. .
(Please see all photos UNDER this text)
A friendly ebayer told me, that it is an octavin. Thank you!
It is one of the instruments, I bought from the essets of an old instrument builder.   No makersname to be found. It is
aprox. 26 3/8 inch high (67cm)I dont know the key or pitch of the instrument.   Of course it will be packed very well for the transit. Please also view my other auctions for instruments. Postage to USA or Canada is 59 USD .I accept payment via paypal, too .
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