At this point, I am saving all pure nickel Canadian coins I get in change. Nickel is going to be much more valuable in the future for NiMH batteries, etc. The RCM is actively retiring the pure nickel coins from circulation. If anyone wants an affordable challenge, put a 1968-2001 pure nickel Canadian set together. I have one and its fun to look at.
I always looked at the detail in the hair, the small bust is tight and pronounced , the lg bust has hair that that is suttle. Compare to a 72 or before ti sticks out clearly. I always heard this was a mule.