3 d. On 30 penny imperial yacht, spacing of lines type II, variety \"double overprint, of it one inverted\", setting 2, position 8 respectively inverted overprint position 3, cancelled \"Rabaul Jan 6 1915\" on piece, only six examples this noticeable variety were so far registered, expertises Holcombe and Scheller, SG No. 23 h, Gibbs 23 g