My questions concern what was done in television with shows that were running long-- specifically in the late to middle 1950s. I have a kinescope of an hour-long program that evidently ran rather tight, as the host of the show finishes a short speech at about the 0:59:15 mark, and the film aburptly jumps to the CBS "camera iris" closing animation. No closing credits or even a closing title card for the show. There is no splice in the print, so this was obvioulsy done at the kine duplication stage. My questions are as follows: 1) Would a program likely have been cut off so abruptly by the network, before a slide or closing credit roll could even get started? 2) Was the "camera iris" animation used as an on-air, show-closing network ID, or was this just something that was added to kine prints as they were shipped to the afilliates? 3) Is 0:59:15 pretty tight content timing for a 60-minute netork slot? I would have though there would be at least about 45 more seconds left for the program. Or would the program have been timed to leave space for a 30-second local ad and station ID?
Thanks for any help that you can give!!