That explains it! I also misread your post as PPK.It does have a heel release
But it would still need to be modified to fit an early pistol with a heel magazine release.Maybe 1911-1918 will pipe up with advice on modding the feed lips of a .32 magazine.
You have a very rare and collectible PP varient, not a plain post-war shooter. And you're even luckier to already have a spare magazine. I wasn't expecting that.I have 2 working mags but was hoping to find 2 more, but not for $200-300. For $50-100 I would be a buyer.
Your father in law had excellent taste in handguns. You're very lucky.My father in law gave it to me and a .32acp PP
In Dieter Marshall's book he notes that Walther changed the ejector/holdopen on 9mmK PPs in March of 1938 to add a small spur to contact proper 9mm K magazines. So using .32 magazines might not activate the holdopen on the last round. There is discussion here and images on this thread on the PP/PPK Forum. You might check the ejector for the presence of the spur.The serial no, is 153740 P. but I have not found it in any list to help with the year of mfg
I believe Legacy has the mags you are looking to buy but let me assure you the price is at leastI have 2 working mags but was hoping to find 2 more, but not for $200-300. For $50-100 I would be a buyer.