That is a beautiful Giles built kit gun! Do you have the original numbered mag to go with it?
At first glance I knew that was a Giles sight as I have a "hardball" commercial 1911 built by him from 1967. I also have a .45 kit gun (012XX B) that is still in the box and has never been built. The slide will only go on the frame about 3/4 of the way so it needs to be hand lapped and fit. I shoot bullseye with a Clark .45 but can't bring my self to have the kit gun finished out.
Thank you for sharing;
View attachment 427945
This is how Giles marked a "hardball" mag. Only one was supplied with the gun. N I stands for National Individual, a term from the DCM matches. "Softball" guns were supplied with 2 mags marked "1" and "2".