some of them had the m2 crest removed. is there evidence of this on the chamber and does the chamber seem like is it refinished? what is your guns serial number?
here is one with its m2 removed.
http://www.gunsinternational.com/190...n_id=100312267
if you lokk at this other gun, you can see what the m2 markings looks like.
http://www.legacy-collectibles.com/h...rtuguese-luger