Only by a few weeks. The story of the identity swap of Jasta 15 & 18 is the stuff of legend. My image was probably taken pre March 14 1918. The straight edge cross was probably added after Jasta 15 & 18 exchange log books. Probably by late March early April. Oblt. Berthold did not want to leave Jasta 15 to become the new Jasta 18 leader. So to comply he forced these 2 units to swap identies keeping the personnel & equipment. In effect they swapped war diary log books.
I Highly recommend the JG II or Jasta 18 books from Elite or Vanguard series from Osprey.
Here is a J.18 book review Check out the thumbnail images there.
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