Chris,
I'm no expert in WWII wrist watches but there is reference to RAF wrist watches being issued to Polish Air Force squadrons serving with the RAF.
Z.M. Wesolowski's (Ziggy's) "A Concise Guide To Military Timepeices" Page 104 shows a 1940 Omega 6B/159 supposedly marked P.A.F. On Page 17 of the same book, Polish Air Force Issue Marks are listed e.g.
/|\
6B/159
A12696
P.A.F.
Ziggy would be your man for more detailed information. Try posting on MWR, I believe Ziggy looks in every now and again. Perhaps Foggy may be able to offer more info.
Good luck,
Terry
p.s. I think you can get a copy of Ziggy's book from Anchor Supplies. It's a must for reference to military watches.