We have discussed this rare variant before – but it think it makes sense to expand – by adding some quality pictures / facts etc.
This Eagle is field Made in Mid East and based on 40mm G-of London Eagle – but with the “small shield of Pilsudski’s Legions” removed (possibly for political reasons)
What makes this variant “distinguishable” – are very characteristic marks at the back (red circle, below).
Seems that this variant is also noticed in latest book by T Zawistowski.
Personally, i do not think it is a very popular variant!
Do You have better pictures etc?