To my knowledge, all American TV airings used one of the home video masters. However, if I’m not mistaken, I believe that the ITV broadcasts in the UK came from a cropped 16mm source; they have un-stretched circular cue marks, and several scenes that were panned on home video instead just show one side and then a hard cut to the other side; cropped prints often made less use of panning, I presume because it was more expensive and time-consuming to do pan and scan with an optical printer than on flying-spot telecine machines?

(Random anecdote: I once saw a 16mm-sourced cropped TV version of Ghidrah, the Three-Headed Monster where they did this kind of cut while someone was walking across frame from right to left, making them appear to warp back to the right!)