In 1977 changes were made to the striking process which resulted in two varieties, high and low 7. The low 7 is far more scarce, thus making it more valuable to collectors.

Coins are minted through a mechanical process in which die stamps are used to press images into a blank planchet to create the heads (obverse) and tails (reverse). From time to time the die stamps are worn or altered and in turn get replaced by a different die stamp. By changing the stamp this can result in slight variations of the same coin, called coin varieties.

The High and Low of the 1977 Canadian Nickel
The High and Low of the 1977 Canadian Nickel
The High and Low of the 1977 Canadian Nickel