Liberia, Robertsport, Liberia, 4-VIII.23, cds with matching "Rebuts" handstamp on Robertsport Post Office imprint cover to the Liberian Consulate in New York City, "Manoh Salijah (?), Sierra Leone" cds and Freetown transit on reverse, with original return reciept enclosure; light wax stain, Very Fine, a rare and quite possibly unique auxiliary marking from Robertsport, unlisted by Cockrill. Estimate  $200 - 300. $0 (Image)