Yes it is a real brain teaser,every time you think you have gone one step forward you then take one back again.I was talking to a friend of mine who is regarded world wide as an expert on military firearms and has written quite a few books on the subject,sujested the lack of serial numbers may mean this motor possibly could have been a proto type and may have not gone to production.Do you think this could be the case since it seems to be a ghost engine, thanks.
