The Royal Canadian Mint is going to release a 1 oz. silver Canadian Maple Leaf bullion coin with a privy mark to commemorate the 43rd World Money Fair, in Berlin, Germany that ran from February 7 to February 9, 2014. The coin is "premium struck for added relief and greater detail." I'm not sure if that means it is a special mint strike or a proof strike. But further on down in the product description it then states, "your coin is meticulously presented in a rare reverse proof finish (brilliant raised elements on frosted background)." Besides the mintage being limited to 7,500 coins, the only difference that I see between this coin and the regular collector's version is the small World Money Fair logo located beneath the Maple leaf on the left-hand side of the stem. Click on the photo above to see a larger more detailed image.
The United States Mint has previously released their Silver American Eagle bullion coin in a variety of finishes and produced them at unusual mint facilities (e.g. San Francisco) to commemorate different anniversaries. Lately they have been producing "limited edition" coins to meet the demand of the public (people can order as many as they want over a four-week period). This is a departure from the 2011 25th Anniversary Set fiasco that had a fixed mintage of 100,000 sets. I hope the United States Mint does not start adding privy marks or other gimmicks to their coins to purposefully create rarities and prevent dedicated collectors and customers from completing their sets.
Photo courtesy of The Royal Canadian Mint, www.mint.ca