You borrow a piece that you sign if necessary, then you make it disappear using a magic scarf. You then pop out a beautiful brass box that you give to a person from the public.
The person opens this box and to its great surprise there is another slightly smaller box. curiosity will it say, it opens this box to find a new box … and it is still not finished because inside there is still a box.
Finally, it opens this fourth box and the signed piece is inside! !

4 brass boxes, a scarf and a gimmick included.