Hi Grantham.!
Many thanks for your inquiry - and let's see if I can't give you a bit of background and figure out how to assist you best, OK?
I run several firearm collector sites - the Lugerforum ((
http://lugerforum.com) and the P38 & PPK Collectors Forum (
http://p38forum.com) - in those two sites, I have about 20,000 or so active collectors and have run them for over a decade. As well, I've also been a Senior Trader/Asst. Manager in one of the single largest firearms retailer on the East Coast - again, for about 10 years? But, I've cut my hours back there given my other work loads recently...
Anyway - are you looking to authenticate your Persian contract C96, or rather - are you looking to estimate its value? I will tell you that it should fall into a specific serial number range, and details like the fine-line grips and dual ringed hammer and other small parts need to be examined closely - as well that the sun/lion emblem should appear "correctly" (I'd get into what the spurious engravings look like - but, rather not)..
As for your Krieghoff Luger.. Same question about are you looking to authenticate or recieve a valuation. In that regard, I actually had (gone now) one of the most expansive HK Luger Collections in the USA, aside from Randall Gibson and Ralph Shattuck (both of who have passed and were equally wonderful friends) - and I've personally authenticated dozens of Krieghoff Lugers - from G dates through to Post-War bring-backs - over the last 20-30 years.
Feel free to Private Message me, and let me know where you are located and what you are thinking with both/either of these fine handguns.
My Best,
John