I'm the proud new owner of a US&S 1911A1, unfortunately not 100% factory.
The slide, the barrel and the barrel bushing have been changed. The slide is a third type from US&S (should be first) and the barrel is a Flannery (should be High Standard).
Maybe the pistol had a shock in the muzzle and that is why these parts have been changed, but impossible to know.
Anyway, if I am writing down here is to know about the London House proof marks on it.
Is it possible to know when they were done? On the barrel, there is a "MP 81", is it in 1981?
Thank you very much if you can help me!
Have a nice day! ;-)