Pan American Slogan Machine Cancels on Cover Assortment, seven covers all with Buffalo advertising slogan machine cancels, five with various combinations of Buffalo and Globe, two multicolor for the "Jacob Dold Packing Co, a Very Fine and beautiful group (Image 2) (Image 3) (Image 4) (Image 5) (Image 6) (Image)

CV. 750-1,000

Three American Machine Cancels, each of the type with a "Micro Number" in killer bars, Boston May 1 1886 with "Micro 1" and two Boston May 4 1886 both with "Micro 2", F-VF, scarce and very seldom seen (Image)

CV. 100-150

Leavitt Experimental Postmark X1 A Die 1. nice strike of Washington DC April 13 1881 on UX5 addressed to NY City, Very Fine (Image)

CV. 400-500