At Pachmayr, beside all the 1911 work we did, we were a warranty repair station for several manufacturers like Colt, S&W and others. The .45 dept was really the handgun dept. For the custom 1911's we would try to work on guns in groups, machining of the signatures, for instance. We would do porting of all the groups barrels at once, ejection ports, sights etc. Then we would take one gun at a time and do the slide tightening (which is a whole other dissertation), cosmetics, like checkering and trigger jobs. It was at that point that we stamped our initials and date on the bottom of the slide.
I don't recall how many "full house" guns compared to a la carte guns we did.
I hope that's helpful.
