I'm afraid I know nothing about Brens held in the USA, but I'm intrested in the Bren you have that is 1938 dated. I am sort of the surviving Bren gun registrar in the UK
and would like to add yours to the list. Being a 1938 gun it would be a reasonably rare Mk1 Double Dovetail and if its a battle field pick up, it most probably is very original. Do you have any photo's? I have a few 1938 guns myself but unfortunatly they are all UK spec deactivated (Dewats). I may be able to give some more info on the gun you have, if it has south african markings, there is a guy in SA that may be able to tell me more about it (And pass on to you). Cheers, Chris.