Lot
1918 
Offices in China, 1919, $1 on 50¢ light violet, top margin plate no. "7049" block of 6, interleaving adherence on tropicalized o.g., strong vibrant color, top right stamp with small small margin flaws at left, Fine appearance, a very rare and seldom offered plate block; with 2015 P.F. certificate. Scott No. K15 $17,500.
Realized: $1,300