$500 Proof

Susquehanna Bridge &
Bank Co., Port Deposit

18 _ _

PMG Choice Uncirculated 64, Proof
There are many Proofs of the lower denominations of this enterprise, but this is the first time that a $500 Proof has graced our halls. A look through the catalogue of the ABNCo archives auction of September 1990 finds that only two Proof sheets in the $100-$100-$500-$1000 configuration were available to bidders.