Neither. Machine doubling is a common occurence in the manufacture of coins. No premium added for it.
This is one of the problems with collecting Canadian coinage. Zoell wrote several books on the errors and varieties found in Canadian coins. A lot of his so-called errors were simply machine doubling or die chips. While some of these made it into the main stream (eg. the "bug tail" nickel and the "extra water line" dollar etc.) most are collected as novelties. The pricing for the most commonly found ones, like the low 7 1977 nickel and the double 7 nickel, should be taken with a grain of salt. It's extremely difficult to get anyone to pay a premium for them. I have probably a hundred low 7 nickels and I wouldn't be able to get 6 cents each for them. If you have MS grades, keep them for yourself especially if you found them at face value. I do keep these in my collection but I actually only need one of each to fill in the spaces. The rest will be put back into circulation eventually.
