Were there not also cue dots of a sort on multi reel films to cue reel changes? Presumably a cinema practice.
Just some background from an ITV perspective. Standard 35mm reels tended to hold about 20-25 mins of film so that was always very handy for feature films and 'shot for tv' stuff'. Everything was previewed well before Tx and notes were made of the last minute or so of the film to give the transmission controller on the night a fair chance of being able to get out of a part on time (think mixing from the film to an end of part slide etc). The notes would perhaps say something like 'Conan Doyle walks over to the dining table, picks up a box of matches and lights his pipe'. It would be much longer than that, but quite descriptive.
So on the night of tx with this info and the part running time the tx controller would be well armed. And if the preview sheet said part one was, let's say, 22' 12" - then it would be, there would be no hesitation in the tx controllers mind that the film lasted precisely what the cue sheet said it would otherwise the whole exercise would be pointless. So, no need for any extra cue dots on the print really, although often they were there if the print had previously done the rounds of the cinemas.
(Interesting what auto correct makes of the expression 'shot for tv' !).
Edited to add. Of course if there was no commercial break and you were just going from one reel of film on one telecine straight to another reel of film on another telecine then the above technique still applied. You just ran the second telecine 5 seconds before needed and switched to it as required, and as dictated to by the crib sheet notes.
Last edited by bluecortina on 26 November 2016 6:26pm - 3 times in total