Angola, ND (ca.1910-30), Republica Portuguesa - Essay "Printer's Design", 1 Angolar, P-Unlisted, Face and Back proofs joined back to back, Brown on olive green and m/c on face with arms at left, back same colors with jungle-forest scene, Printers presentation essay, possibly for the 1926 issue that was printed by TDLR. OFZ. PMG mounted in holder with no grade. Rare if not unique.
Estimate: $600-900