Lot
2559 
Offices in China, 1919, $1 on 50¢ light violet, left margin plate block of 6 with plate number 7040, o.g., never hinged, bright fresh color, perfs just touching at right, usual staple holes in selvage, Fine and rare. Scott No. K15 $17,500 for hinged.
The $1 on 50¢ Shanghai plate block is a great rarity and after a search of our, R. Siegel's and the Philatelic Foundation's computerized records, we found only 4 plate blocks of any type are recorded. This is the only never hinged plate block known to us.
Realized: $3,500