Heinrich Köhler Auction 380 - Day 6 Special Catalogue: Germany

"No stamps available" endorsedment on cover with adjacent Gibbs type 8 cancel "RABAUL MAY 7 1915 NEW BRITAIN" addressed to New-South-Wales, on upper left with further endorsedment "Garrison Duty Kaewieng" and "Captain M..." at lower left, small parts overwritten, opened out for display, vertical fold and light aging, an interesting and rare cover
Reference: depicted in G.R.I. by Robert M. Gibbs, page 137