Lot
677 
Leavitt Machine, "Boston, Mass. Nov. 15" Prototype Cancel, clear strike cancels 1¢ postal card (UX5) to East Pepperell Mass., preprinted ad message for Bigelow Portable Engine and Boiler, Very Fine and choice. Estimate $3,000 - 4,000.
ONE OF TWO RECORDED TESTS OF THE LEAVITT PROTOTYPE MACHINE CANCEL.
Leavitt tested a prototype device on November 15, 1875, seven weeks before the first regular machine was placed in service. The cancel was composed of dashed lines and only one cork killer was used. Two examples are known, the post card offered here and a cover.
Realized: $2,600