Two paper charts are held in a frame behind rows of wires on which movable beads are strung. The charts are printed or hand-ruled to illustrate probability concepts. Tabs at the top of the unit allow the charts to be exchanged. One chart is blank on one side; the other is printed on both sides.. There is a paper label attached to the back of the object with masking tape. The label is printed with the legend, "In or add to S list," and has the additional handwritten notation, "S95."
Identifying Numbers
Other number
S95
S95 written on paper label taped to back of object