I appreciate your efforts Fatman, I was able to spend a little time and found a description on another forum, that besides the serial number, ( which I did not release ) was identical in everyway, and even showed a picture of the holster, where the Nazi marks were, and I examined the holster again, and yep, it's there, just very small. I need to get a few pics before I turn this back to my client, and share them here. I really hope he is pleased, and I will advise him of the value, (historic and monetary) and before He inherited this was looking for a 9mm pistol, this is still a good solid piece, but if it was stolen would be a heart breaker, My advice to him, will be, keep it as a collectors piece, not to mention his dad's pistol, and do go shoot it, but, if he's gonna carry it, carry on his person, not in the glove box. He could sell it here for probably 800 - 1,000 bucks and get 2 good 9mm's, or 1 good one, with money left over for ammo and spare mags.
A friend of mine will take it to his gunstore tomorrow for a real evaluation, but the figures came from him describing it to their recognized evaluator.
I'm just really glad he brought it to me, and I get to share in the findings.