Lot
1674 
1869, 12¢ green, used with 10¢ Brown (150), affixed slightly overlapping, cork cancels, "Bath Me. Jun 2" backstamp on small narrow 1870 cover addressed in violet to Callao, Peru, red "New York Jun 4" exchange cds and matching "12" cent credit to G.B., Callao (6.30.70) arrival backstamp; reduced slightly at right, Very Fine and scarce mixed franking for the 22¢ rate via British Packet, ex-Dr. Heimburger. Scott No. 117 Estimate $750 - 1,000.
Accompanied by analysis of sailing information confirming the 1870 use, this is a very early use of the ungrilled National Bank Note Co. issue (EDU is May 14 off cover and May 19 on cover).