FRESH AND FINE. AN EXCEEDINGLY RARE PLATE NUMBER BLOCK OF SIX OF THE 10-CENT POSTAGE DUE WITH DOUBLE OVERPRINT. ONLY ONE PANE OF 100 IS KNOWN TO HAVE BEEN PRINTED WITH THE DOUBLE OVERPRINT.
According to Canal Zone Stamps only one pane of 100 received the double overprint. We are unaware if the other plate no. survived or what form it is in, so this plate block may be unique. Scott Retail as singles