Spotter mode....
Swissair operated ad-hoc A310s then switched to Fri/Sat/Sun ops for them around November 1987, with MD80s/DC9s on the other days. Think it was another 2 to 3 years before it was A310s on all flights; we did have 2 Dc10s come in.
Air France put A310s/A300s on whenever there was an "event" (normally football) that involved a Paris side playing a northwest England side (plus Euro 96). Saw 2 or 3 AF 747s here (not including those days with the fuel problems at CDG/Orly!).
Lufthansa used both A310s and A300s intermittently (likewise with Euro96), though on at least one occasion, we had 2 737s operating within an hour or so of each other as LH074 and LH074A.
And showing my age... I remember the Monday morning and Friday lunchtime KL DC8s when I was at Parrs Wood High School.
Alitalia also used the A300 for the Student Games in Sheffield in 1991 and I'm sure Olympic used A300s on a couple of occasions?