The lowest mintage regular issue(business strike and proof) is the 1916 matte proof, mintage 1050. You can only determine the lowest mintage on something the mint actually counted so that excludes all transitional coins, die varieties, and errors. Looking at the pop records on Heritage, PCGS/NGC have certified 34 RD, 171 RB, and 59 BN.
BTW, nice to see you again biggfredd
