Lot 8301867, 12¢ black, E. grill, strong grill, tied by brilliant red quartered cork, matching "Supplementary Mail" framed type A handstamp and "New York, Paid All, Jul 30" exchange cds on 1868 cover to London, England, red London Paid (8.10) arrival cds; some light soiling, F.-V.F. and scarce New York supplementary mail use.
Scott No. 90 Estimate $500 - 750.
Cover was prepaid 12¢ treaty rate by stamp plus the 12¢ supplementary fee in cash.