New to me Luger

[Gatorade]

My my grandfather gave me this Luger. I know he bought it in the US. He brought back an Artillery Luger from Germany but that one is still in the safe. I tried to highlight all the proof marks I could find. I haven’t learned how to take it apart yet so taking the grip panels off is as far as I dare to go. Almost all the parts I see are “12” which matches with the serial number except the takedown lever which is marked “94”. I don’t know much about it so any info would be helpful in trying to determine things like history, and value. Thanks!