108a, 108 (108b, 108) 1914 6d on 50pf black and purple on buff Kaiser's Yacht with "G.R.I." overprint SG Type 13, block of four with the top two being examples of the ERROR - inverted "9" for "6" (from the ninth row), on piece with "Apia" cds, bottom sheet-margin (with "Samoa"), a very attractive specialist piece, signed Giesecke.
