Over the holidays my grandfather gave me a bunch of old Canadian coins including many silver dimes. among these dimes was a 1947 maple leaf. now a little back story:
Canada was under the British rule for the longest time and to this day (even after they declared independent) the head of the British monarchs are found on their coinage. well in 1947 India became independent from Britain and there for the Latin phrase on the obverse didn't hold true anymore "GEORGIVS Vl D : G : REX ET IND: IMP:" - omnipotent King of Great Britain and Emperor of India. Since it was too late to change all of those dies that were already made for that year they added a maple leaf next to the date to symbolize the loss of India. the following year they rewrote the phrase but only the king of great Britain.
this is true by all the 1947 issued coins (at least in Canada) but there is a variety that does not have the leaf that were released earlier in the year. (i believe those ones are rarer and consequently worth more)