Lot 10242 – 1866, 50r blue, a magnificent horizontal pair with marginal imprint on cover

1866, 50r blue, a magnificent horizontal pair including sheet margin at right showing “American Bank N…” imprint in English, used on single weight cover to Amparo endorsed “pr. Santa Maria”, tied by cork cancels with matching “Rio de Janeiro/22 Nov 1872” cds in centre and arrival on reverse; probably the finest example of this value with marginal imprint on cover.