Lot 1282 Montreal (1902 Experimental Machine), the rare “X3” used for only 4 hours on May 1st, 1902 canceling 1c stationery card to Ottawa. One of only 3 reported. Ex. David Sessions. From the Robert Heasman Collection of Early Canadian Machine Cancellations. Estimate $600, sold for C$1,700.00 plus 17% buyer’s premium.