Thanks for all the info guys! Well, I just need to pull my mag and measure the lugs I guess. I couldn't remember if they were long or short. The reason I asked, is I was under the impression that the XH1042 was a short lug mag built after 1940. Maybe they made them both ways or the lug piece is interchangeable? Dan, maybe I need to see what years are associated with those serial numbers you mentioned.
Teddy, what long lug mag do you have? Maybe you could tell me your serial number range?
Ron & Bob & amtrac, thanks for those comments and advice! All good info!