I am currently reading "Thunderbolt! by Robert S. Johnson and toward the end of the book he describe closing on two fighters attacking a lone Bomber. He describes them having to outline of a Fw-190 from a distance but as he closes he see's they have a "pointy nose with an in-line engine" and states they are the new FW-290. This would have been in early 1944, I think he stated it was in the month of January 1944 if I remember correctly.
Anyone knwo to which he is referring. My first instinct is he was seeing a FW-190 D-9 series, but am not sure when those went into combat service.