Paper testing was started using the 1928-A $1 Silver Certificate plates. The objective was to see if a longer circulation life could be achieved by using different papers. Test results, if any, were never published most likely because not enough notes were recovered to draw a conclusion. Printing was done in late 1932 and the notes put into circulation in early 1933. The X-B and Y-B groups were on experimental paper. The Z-B group was the control. Not surprisingly my notes are low grade; higher grades cost beyond what I was willing to spend. 1928-A X-B Experimental Series 1928-A Y-B Experimental Series (PCGS F12) 1928-A Z-B Experimental Series (PCGS F12)
