>>One thought that crossed my mind is that kills #16 and #17 were said to occur on June 18, 1916, the day that Immelmann died-I would assume on the same flight that he was killed.<<
You are right, RichieB16!
There was always only one offical number for Max Immelman´s score existing: 15!
Nevertheless he scored two more victories in air combat on his last day.
For some unknown reason both victories were not offically attributed to
Max Immelmann. One was going to Max Mulzer. Don´t know who got the other one.
So the number of 15 has obviously something to do with the fact that Max Immelmann could not report the victories himself. Otherwise his offical score would have been 17. Therefore some source books report 17 victories instead of the offical score of 15.
VBR
Rammjaeger