365 / September 2017
365. Heinrich Koehler Auction
Provisional Overprint "50 Cts. 50" on 10c. green, block of four with clear violet cds. "SCADTA ESMERALDAS ECUADOR -7.OCT.1928", a very fine and magnificent rare multiple of this stamp with just 100 printed and being much rarer in used condition, certificate Moorhouse