Coincidentally, I happened upon that high res image just this morning through a different search, at a Komet info website. At this time, I have narrowed my choices to that particular aircraft, 191301, and "White 18" from JG600. The latter saw action of course, while 191301 was probably selected specifically because it was in new or mostly unused condition. Note that it even had the tail wheel fairing still installed, which most had removed in service. Thanks for that link -- other nice Komet shots there I have not seen before!