Bidspirit auction | Bulgaria
Bulgaria - 1918, Tsar Ferdinand, imperforate plate proofs of 1st-10st, complete set of four, blocks of four printed on thin chalk-surfaced paper, no gum as produced, NH, VF and rare, Est. $800-$1,000, Scott #130-33
Bulgaria - 1918, Tsar Ferdinand, imperforate plate proofs of 1st-10st, complete set of four, blocks of four printed on thin chalk-surfaced paper, no gum as produced, NH, VF and rare, Est. $800-$1,000, Scott #130-33