Examples of the type
1980 PM 
Private collection
1980 PM
1980 PM
1980 PM
Clearer
Private collection
1980 PM
– (en) Proof; 2 minor variants of die mark exist
1980 PM
– (en) Proof; 2 minor variants of die mark exist
Private collection
1982 PM – (en) baby crib privy mark
1982 PM – (en) baby crib privy mark
Private collection
1983 PM – (en) 2 minor variants of die mark exist
1983 PM
– (en) 2 minor variants of die mark exist
Private collection
1983 PM – (en) Proof; no die mark
1983 PM – (en) Proof; no die mark
Private collection
1983 PM – (en) Proof; no die mark
1983 PM – (en) Proof; no die mark