enansb
I was stationed at Kai Tak in the early fifties and remember the CPA C4's on a weekly service from Vancouver via Tokyo. The BOAC Argonauts provided a regular "mail from home" service"
Regarding the C4 range. In 1953 I flew on a BOAC Argonaut (RAF charter) from London to Montreal via Iceland.
My records show that the flight time from Keflavik to Dorval 10hrs 50min. and a lot faster than a DC4. Quite a respectable performance I would say.