Porto Rico Overprint Specimen Set: Regency Superior Sale 93, June 9 & 10
Puero Rico RS9 $50 Excise Tax Stamp
This stamp is part of the Puerto Rico revenue excise issue RS1-9. The set is possibly unique as each stamp displays a "Specimen" handstamp. The lot was listed by Regency Superior at a value of $1500 but was reported to have sold for $1050.