1878 Shield Nickel. Proof-66 Cameo (PCGS). CAC.This handsomely original Gem is dusted with slightly mottled pale copper-rose patina. The toning is basically iridescent in quality, allowing ready appreciation of reflective fields as the surfaces dip into a light. In true cameo fashion, the device are set apart with a softly frosted texture, and they are fully struck over even the most intricate design elements. Exceptional quality and strong eye appeal for this popular Proof-only issue, one of just two in the Shield nickel series.