Thank youHere is the sticky at the top of the Sig Pistol Forum on date codes:
This link shows charts that you have a Kiehl proof house marking:
It is a .45 auto and I am sure it shoots better than me.What caliber is it, please?
Out of curiosity, any other markings or stamps on the pistol?
I read your link. Really good info there.Here is a link to an article that will give you a lot of information on the markings...