Lot 40537 – 1873-80 2 1/2d Rosy Mauve LH-FL ERROR OF LETTERING

1873-80 2 1/2d Rosy Mauve LH-FL ERROR OF LETTERING in pair on 1876 envelope sent registered to France, paying single UPU rate plus 4d reg’n fee, tied by “436” numerals (clear of variety), Lancaster cds alongside with boxed “R” hs, London reg’d oval ds and Calais transit, further French transits on reverse, cover faults, still a scarce error on cover (SG £2’600 for used single)