Are there any projectionists out there that worked either on the Rank or ABC circuits, during the late fifties and early sixties, that can clarify what the standard 'widescreen' (not 'Scope) ratio was used? It would be either 1.66 or 1.75:1 or both. I worked at Rank theatres from '64 and can't remember for sure which one we used. The UK didn't standardise to 1.85 until sometime in the late sixties or early seventies, unlike the US which was much earlier.