Guppy:
"Hohun and I have gone around a bit on when the D9 showed up as there are a number of Allied pilot reports of 'long noses' starting in the Spring of 44 but it sounds like they didn't reach operational service until the Fall of 44. "
I recall Johnny Johnsson mentioning the German Ace "Matoni" flying a long nosed 190. Unfortunately I do not have his book with me right now, but I belive it referred to the summer 1944.
Anyway, that may provide you with a lead
