Reverse Proof. A proof finish of the entire coin or medal’s surface with reflective mirror-like surface on the devices and lettering only with background or field in a satin matte finish. It is the “reverse” of the customary cameo proof where the devices are satin matte, and background is proof polished (because this area is highest in the die, it is easiest to proof polish). The Royal Canadian Mint was first to issue coins in reverse proof in 1981. It struck gold Maple Leaf bullion coins that year with the new proof polishing technique, calling it “brilliant relief on a satin background.” Other countries followed – Great Britain, Austria, Australia – and the United States in 2006. The choice of the two proof surfaces are to give contrast to each other on the same side of a coin or medal.