cover 6c Dull Pink (159), average centered single, tied by bold NYFM Geometric cancel (type G21) on immaculate 1875 orange buff cover with printed corner card to England, red 'New York P.O.' exchange c.d.s., red London transit, also incl. another similar same correspondence cover with 6c Dull Pink (159), tied by bold NYFM Geometric cancel (type G1), latter has cover mend at T. not affecting stamp or markings, otherwise very fine lot