Hello Stig,
Am I completely satisfied with this link as an answer, well no, but the site owner claims to have seen a photo of a Pomilio PF:
http://www.worldairforces.com/Countries/italy/itl.html
Obviously I'd like to see that photograph, assuming the machine in my link isn't. I hesistate to ask, but could Kees be of any assistance?
Also, I've looked at the Pomilio WDF P.10 and an Ansaldo A.3 or A.4 might be an answer. Wildest speculation here, but could the putative PF have been redesignated as either of these machines?
Regards,
Clint