The buckle is original EC is still an unknown maker I believe at this moment in time, there have speculations as to the maker but nothing proven at the moment. The buckle might have been repainted at some point, it looks like there is paint over rust. A hard to find buckle actually, I have not seen many around with this maker mark
Thanks for your opinion Ben. So, do you think it would be better to wait for another with surer origin?
OK, thanks again. it is an auction, I'll see how it turns out.
Hopefully you will do well