I think the far east route in the 1950s was The Argonaut and Constellation routes, and eventually giving way to the Britannia.
The Stratacruiser was normally reserved for the north Atlantic routes, and the crews were known as the North Atlantic Barons.
Towards the end of the 1950s I understand the Strat was used also on some West Africa routes.
I could be wrong though as the 1950s was just before my time