My76Strat,
The 1983-P&D are both known struck in pre-zinc planchets. Two were found by collectors buying my book,
Strike It Rich With Pocket Change, within weeks of buying it.
My coauthor and I included the 1983 solid copper-alloy cent after Billy Crawford of SC found one by weighing every 1983 cent he found.
After including it, I decided that for the next edition we should add a note indicating that it was just as likely they be struck on 1983-D cents too.
As as a result both Mints are now known.
This the Jeff Young specimen of the 1983-D, the first reported for that Mint.

Here is the Janet Hett specimen:

Here is a look at my 1983-P Nickel struck in a pre-83 planchet:
