5 Dollars - Elizabeth II SML fractional set, 1 oz

The "SML" designation refers to the Selective Micro-Laser engraving process the Royal Canadian Mint introduced to combat counterfeiting on its bullion issues — microscopic maple leaf privy marks laser-etched with a date code that changes annually, making year-specific authentication possible in a way conventional minting cannot replicate. This 2015 fractional set piece carries the "15" date privy, which distinguishes it from the broader Maple Leaf bullion run of the same year.

The .9999 fineness standard was itself a marketing and metallurgical statement when the RCM adopted it — four-nines purity was not then the industry norm for sovereign bullion.