Unknown Manufacturer, "Washington D.C., Jun 21, 1906", repeater machine cancel ties 3¢ green (300) on Congressional Library picture post card to Rochester Ind., Jun. 22nd receiving cds, Very Fine and scarce, This cancel is known used only two days, Jun. 21st and Jun. 22nd 1906. Scott No. 300  Estimate $150 - 200. $0 (Image)