Los-Nr. 1174

1862/64, 1 sh. green, plate no. 1, tied by New York sunburst kork cancel with adjacent "NEW YORK MAY 20 1863" to embossed commercial letter "ST. NICHOLAS HOTEL BROADWAY NEW YORK" to Canada with Motreal transit mark; the envelope with corner faults and crease at right not effecting the stamp, otherwise fine; a very unusual and rare use of a British stamp on the US, apparently fully accepted