Greetings everyone. I have a Walther P38 that I picked up a few months ago at my local gunshop. It came to me as a chromed mixmaster, with a mismatched Walther frame & barrel, and a Mauser slide and magazine. I've since replaced the slide with an unmarked blued example I bought off eBay, and the magazine with a Walther-marked postwar example. I'm trying to get an idea of when this pistol may have been built, since the original slide is long gone. Any thoughts?