Fr. 1200m. 1922 $50 Gold Certificate Mule Note. PMG Very Fine 30.John Burke Back Plate #1. Both the PMG and PCGS Population Reports confirm the fact that this Mule is roughly ten times as scarce as the regular note. The margins on this piece are solid on all sides and the centering appears visually perfect. Recent results show that a typical large serial number example in VF 30 grade sells for around $1,000. This much scarcer mule should easily eclipse that figure.