Vaguely on topic re. the Argonaut, sometime in early October '55 I flew in an Argonaut on the first BOAC 'trooping' flight to Khormaksar. We routed Heathrow - Rome- Cairo - K'sar. I don't have the exact date or registration but would it be possible to ferret out the details, this far removed? There were only a few of these charters as, presumably courtesy of the 'bean-counters', the contract changed to Britavia et al.
OGaH's mention of the green leather seats stikes a chord ... SLFs were similarly catered for.
Homeward-bound, two and a bit years later, via British United Hermes, was distinctly down-market!