The CSA Britannias were leased, one at a time, from Cubana, and returned there afterwards. It was a long term arrangement for them through the 1960s, and they were re-registered and repainted in CSA livery. They didn't appear in the timetable on any route other than Havana. Leave Prague Monday afternoon via Shannon and Gander, into Havana Tuesday morning. Return Thursday morning, via Gander but omitting Shannon, into Prague Friday morning. They typically crossed each way the Cubana Britannia doing their own weekly flight to Prague.