Think I got a deal on my first Luger

[BKS613]

Hey guys, great site! Picked up my first Luger today - externally matching (haven't detail stripped it to confirm firing pin and internals match) BYF 42 with matching mag and spare mag with 5 rounds of WWII era ammo included. Only obvious issue to my (a complete Luger novice) eye is the cracked FXO magazine base. I think I got a pretty good deal on it based on pricing in "Standard Catalog of Luger" but I did have a question on the spare magazine. From some quick internet research it looks like a Luftwaffe mag but I have no real idea. A P38 was actually next in line for my collection but I couldn't pass on this. Any additional info on the mag would be appreciated as well as any issues I might have missed. I'm not looking for value to sell but hoping for once I didn't take a bath on a collectible pistol I've wanted and finally bought