Lot
663 
American Postal Machine Co., "Seattle Wash Exposition Station Jun. 23 1-PM, 1909", bold strike with "Alaska-Yukon Exposition" flag machine cancel ties 1¢ blue green (300) on multicolored Mines building expo postcard to Sedro-Woolley Wash.; light toning, Very Fine and rare, ex-Heimburger. Estimate $3,000 - 4,000.
ONE OF THREE RECORDED EXAMPLES OF THE ALASKA-YUKON EXPOSITION FLAG MACHINE CANCEL, ONE OF THE KEY EXPOSITION POSTMARKS.
One of the other two recorded examples of this rare postal marking realized $9,000 hammer in the first Brody sale held by Shreves.
Realized: $2,200