2 1/2 Dollar imperial yacht, right lower corner of the sheet, neat cancelled single circle postmark \"TSINGTAU a 13 7 07\", superb in every respect (choice copy), expertized Richter and photo expertize Steuer BPP (2018) : \"the key value the Ship edition in dollar exchange watermarked [. ] is genuine and date-appropriate cancelled. The very fine submission. \", Michel 600.-