Lot
2018 
1911, 1¢ green, imperf, horizontal coil, pair with 3mm spacing and large margins, tied by "Denver, Colo. Sep 23 1912" wavy flag machine cancel on post card to Austria, forwarded to Potsdam; card scuff and adherence, otherwise Very Fine and rare. Scott No. 383H Estimate $500 - 750.
ONE OF ONLY TWO RECORDED 1910 1¢ IMPERFORATE HORIZONTAL COILS USED ON COVER.
Realized: $525