I have a Symphonion Manivelle disc musical box which plays 5-3/4 inch
discs with serrated edges.  Mine is missing the small brass locking-nut
which holds the disc in position.
 
I am going to have one made but I realise it will be cheaper to have
more than one made, so if anyone needs one please let me know in the
next week with your full address details and I will let you know the
costs when I have received a quote for them.
 
Kevin McElhone, Northampton, UK