OK - my last try - not the most logical routing, but they has many crazy routing

(I recall TPE was operated via VIE even in late 1980's).
KLM with DC-8. CMN-ZRH-AMS//AMS-CPH-ARN
DC-8 joined KLM fleet in 1960 (as per Wikipedia), so who knows...
2. KLM Royal Dutch is
correct!
However, the equipment operated on both flights wasn't the DC-8.
And we await the tap-in here.....