Sinkiang, 1937, 40¢ orange, Double Sun Re-entry. Center stamp in a block of 9, o.g., top center stamp lightly hinged, rich brilliant color, F.-V.F., even single examples of this variety with Sinkiang?s common Peking overprint are virtually unknown, this block of nine with the scarcer Shanghai overprint is probably only one of less than five extant blocks. Chan No. PS134a. Scott No. 112 var.  Estimate $1,000 - 1,500. $0 (Image)