First flight Washington-Baltimore — BOAC — June 1st 1961 — stamps on the Automated Post Office of 1960

Description

Commemorative postcard of the first BOAC flight from Washington-Baltimore to London, dated June 1st 1961, franked with a block of four 4¢ US stamps depicting the Automated Post Office of 1960 in Providence. Postmark canceled in Baltimore, Maryland on June 1st 1961 with a postal office stamp. Handwritten address to E Gordon in Orlando, Florida.