102a, b var (102a, d, e) 1914 ½d on 5pf green Yacht - the UNIQUE ERROR - double overprint in combination with the ERROR - no fraction bar in ½ and VARIETY - 1 to the left of 2 in "½" (Gibbs 2eb), an exceptional combination and a stellar rarity-considering only 8 double overprints were printed in all, well centered.
