Unknown Manufacturer, Pittsburgh, Pa., undated machine cancel with Shield fancy cancel tying 1¢ ultramarine (145) on M.M. Tilton advertising cover to Chillicothe Me., forwarded with blue "Chillicothe Me. Jul 22" cds and "Forwarded" straightline to Cullettsville N.C., unsealed flap with partial offset, opened at sides, Very Fine strike. Estimate  $400 - 600. This is one of only a few third class usages known with this machine cancel, each has the date slugs removed. $0 (Image)