~ sopranino saxophone ~
Not often in use, but still in the collection is a sopranino saxophone.
This is Conn M147244. Available at any moment! Alas it lacks the original Conn mouthpiece, so at present it has to do with a Selmer C**, which is not really an ideal match, for a horn of this vintage.
Not too much proof exists, but one video from USA friend Lee Mason gives an example.