Fr. 2126-C. 1996 $50 Federal Reserve Note. Philadelphia. PCGS Currency Gem New 66 PPQ. Specimen.Specimen overprints and serial numbers. These Federal Reserve Note specimens are always popular with collectors. They are extremely scarce and downright rare when compared to the issuance of specimen notes from other countries. This $50 "Big Head," shows the typical ladder serial number with AC234567989A observed here. Strikingly fresh and well centered.