3DSK - Thank You for a philosophical response.
I know it is PAF French Pattern (reasonably rare if original)
The genesis of my question is that i have never seen a genuine ones (for example on the hats at Sikorski Institute) for me to form educated judgement on this particular one.
From what i learned original Eagles of this type had been made with oxida / silver effect or casted in brass.
There are some pictures in Zawistowki Book too + i have some picture of Polish Pilots in France but Eagles on them are very small due to distance + all is b&w.
Anyway if You have some relevant info please share.