24c Gray (78b).
Tied by target cancel and Illinois town datestamp on cover to London, England and forwarded to Paris, France,
24c stamp also tied by red "3 Cents" credit handstamp, forwarding postage paid by horizontal strip of three and single of Great Britain 1p Red, Plate 80 (33),
tied by bold strikes of "88" in barred oval handstamps, "London MY 31, 1866" datestamp, French transit and receiving markings, one stamp in Great Britain strip folded back to display the 24c stamp, light edgewear, Very Fine and attractive two-country franking, ex "Sevenoaks"
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