Nova Scotia, 1851, 6d Yellow Green, four margins, tied by oval grid on 1852 folded letter from Halifax to New York City, endorsed "p Mail", red "Paid" straightline handstamp, Halifax (2.23) and St. Johns N.B. backstamps, Very Fine and choice cross border use. SG No. 5. Scott No. 4  $1,600. $0 (Image)