1857 (c., Jan. 28) Providence R.I. to Callao, Peru, blue lined cover bearing 10¢ green, type II (14) pair and 12¢ black (17) pair with right sheet margin, cancelled by light strikes of red circular grids, large manuscript "2" signifying double weight and endorsed "with 3 papers" at bottom left, New York manuscript "24" cent credit rating, reverse with "Forwarded by Crosby & Co., Callao, Peru" oval forwarders handstamp and indistinct blue arrival cds; no flap, small stamp and cover flaws incl. tear at left, Fine. Estimate  $2,000 - 3,000. AN EXCEPTIONALLY RARE DOUBLE WEIGHT USE AT THE 22¢ TREATY RATE TO PERU PREPAID BY THE 1851 ISSUE. Prepaid at double the 22¢ per ½ oz. rate by American packet to Panama, then by British packet to Peru effective December 1, 1856 to September 30, 1864. $0 (Image)