I don't know the precise serial number, but it is from the serial group of Fok. D.VII 4250-4399/18.
I am able to identify the machine into this group,but not to a specific number. In this group were both the 200 PsMercedes D.IIIaüv and the185 Ps BMWIIIa engined Fok. D.VIIs. On another thread, "Jasta 19 colors", Rick and I have been discussing the colors of this machine. I like Rick am not to sure the nose was ever yellow?
P.S. Got you e-mail, will get an answer off to you.