There are 5 Numista selections available for the 1970 S 1 cent Lincoln memorial Penny.
https://en.numista.com/catalogue/pieces42.html
1) 1970 S 690,560,004
2) 1970 S Proof
3) 1970 S double die reverse
4) 1970 S large date low 7
5) 1970 S small date level 7
There should only be 4 known types/varieties not 5
The #4) large date variety is the common one and is inclusive of the #1) general issue. The 1970 small date and double die are rarer varieties and then there is the Proof only issue.
Could #1) and #4) be merged to avoid confusion?