(Experimental Perforations) 3¢ Dull Red, Type II, Unofficial "Chicago" Perf 12½, Two Singles, positions 64L5L & 9L5L, tied by neat strike of "Chicago Ill. Oct. 8, 1856" cds on orange cover addressed to R. K. Swift at the Clarendon Hotel in N.Y. and forwarded to Boston Mass., red "Forwarded" handstamp crossed out and with "Please take notice I am" with forwarding hand drawn in; cover defective at left and right stamp light diagonal crease from cover, F.-V.F., a remarkable cover bearing two 3¢ Chicago Perf stamps and addressed to R. K. Swift, the promoter of the Hadley Perforating Machine.; with 2009 P.F. certificate. Scott No. 11A  Estimate $1,500 - 2,000. $0 (Image)