VERY FINE. A CHOICE AND FASCINATING COVER SHOWING THE TRANSITION FROM THE 27-CENT TO 15-CENT TREATY RATES.
Ex Knapp and "Andromeda". With 2011 P.F. certificate
VERY FINE COMBINATION OF 15-CENT AND 6-CENT 1873 BANK NOTE ISSUES FOR 18-CENT DOUBLE-RATE COVER TO FRANCE PLUS EQUIVALENT FEE FOR SUPPLEMENTARY MAIL.
The new U.S.-France treaty effective Aug. 1, 1874 set the reciprocal prepaid rate at 9c per 15 grams. This franking paid double the 9c treaty rate plus an additional 18c for Supplementary Mail, allowing it to be processed in New York after the regular mails had closed.