Welcome to the forum, a lot of your answers can be found on this website http://www.coinsandcanda.com
to help you out:
1) yes, I have found about 20 or so of these while roll hunting, I believe the stat I read is that less than 1% of the production was this variety (no real numbers are published)
2) Yes, rarity is debatable, the value has come down from the first time it was noticed. Yes these were circulated.
3) 1978 has large/small denticles
4) 1980 has near / far beads
5) no these were only produced in mint sets
to help you out:
1) yes, I have found about 20 or so of these while roll hunting, I believe the stat I read is that less than 1% of the production was this variety (no real numbers are published)
2) Yes, rarity is debatable, the value has come down from the first time it was noticed. Yes these were circulated.
3) 1978 has large/small denticles
4) 1980 has near / far beads
5) no these were only produced in mint sets





















