Video Collector said:
Wasn't the UK DVD awkwardly cropped top/bottom to make it 1.78 widescreen? Maybe I'm misremembering? (They used the same master for a Blu-ray release.)
Actually, that one was cropped a little bit but not far off from the 1.66:1 negative ratio. Going by those screen grabs of the 16mm U.S print, it seems that the opening and ending credits are open matte (they were recreated for that release) while the rest of film itself is hardmatted at 1.75:1.