double circle datestamp on folded letter to Chiavari, Italy, franked with 1861 3c Rose and four 10c Green (65, 68) with black cogwheels, red "New York Paid 24 Jan 6" exchange datestamp, January 20 Calais entry and boxed "PD", backstamped Genoa and Chiavari, light wear, very fine and scarce cover, 43c postage overpays by 1c double the 21c French Mail rate