Details
used 10d. red-brown, the error printed on watermark Emblems paper, KA, used with neat part London "S.E/11" numeral cancellation; small tear at right and some perfs. clipped at left, otherwise fine. Very rare. R.P.S. Certificate (1954 duplicate of 1924 original). S.G. 99, £12,000. Photo
Further details
Note: Eleven or twelve examples of this error are believed to exist, all are used and seven of these were cancelled at Constantinople