San Francisco, Cal., Feb 19 (San Francisco), cds and target duplex on reverse of printed address cover to Townsend, Mass., front with matching "Held For Postage" handstamp and blue private "Steamer" handstamp, with original 1866 enclosure, Extremely Fine, a choice strike of this uncommon auxillary marking. Estimate  $100 - 150. $0 (Image)