In Digest 970110 Robbie Rhodes wrote :

>[ I once flipped the Ampico roll of "Turkey in the Straw", inverting
>[ the notes bass-to-treble; the tune was actually (more-or-less)
>[ recognizable!

May I suggest to try a roll converted into a Moebius strip?

I know there is a score of music which can be put upside down and play
the same thing : probably by Mozart (or J. S. Bach ?).  If anyone could
find the exact reference, I should be very grateful to him (or her).

It is different from a mirror canon or a crab canon (inversus), which may
be read without turning materially the score upside down.

Philippe Rouille¶
(Paris, France)¶
rouille@cnam.fr¶
http://www.cnam.fr/museum/musica_mecanica/

 [ A music teacher brought his "fiddle" (a Guarnerius!) to class and
 [ performed a Mozart canon for us.  The manuscript is intended to
 [ lie on a horizontal music table, with the teacher and student
 [ standing in opposition.  Since we had no one to play the student's
 [ part the teacher played both parts of the canon simultaneously!  (He
 [ was formerly the Concertmaster of the Chicago Symphony.)  -- Robbie