Well, David, I have a few years on you, I'm afraid. I started as one of the first male operators after the phone company lost a sex discrimantion suit in 1972. At the same time, women were finally allowed into the higher paying plant jobs. I worked the last cord board in Los Angeles & some of those old girls had been there since WWII ! One of the regular "nuissance" callers we had was some jerk who called Buckingham Palce-collect, in those days the Palace accepted the charges- Anyway, years later, I had become a supervisor & this same person was making the same calls, except he had to go through a supervisor & the palace had stopped accepting his calls. Eventually he was banned from more than one call a year. A long legal process between the Palace & AT&T. Obviously I got to know the palace swichboard operators & eventually met several of them. Anyway, the point of all this is- yes, paper logs were kept at both ends, even in those days [now it is all on computer tapes] and since Bell invented this system, I am sure the same was done at AP.. It would be fascinating to find them wouldn't it?
As an aside, nowadays, when I visit certain friends in London, their flat is literally under the shadow of the Telecom Tower !!
David, you & I could bore this board endless with phone stories couldn't we?