Originally Posted by
ExSp33db1rd
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An earlier post queried the call sign Clipper One, or Two. and a response was that Clipper Two was the Round the World service Westwards from USA. Not sure if all airlines followed the protocol, i.e. was it an ICAO thing ? but I recall flight numbers followed the principle " Evens go East " e.g. BA 510 went to New York and BA 509 came back.
My memory dims,but wasn't Speedbird 1 (or as they would say "Speedbird concorde 1") the EGLL to KJFK service ?