In 1998, on the August 22/23, Zurich Airport celebrated its 50th anniversary, including an open day with historic aircraft & an AF Concorde visiting. Among the classic aircraft invited & attending was the MATS Constellation 48-0609 (N494TW), Air Atlantique's DC-6 G-SIXC, the South African Historic Flight DC-4 ZS-BMH plus some old iron of local operators, such as both of Classic Air's DC-3 aircraft. As coincidence wants it, Air Atlantique's DC-6 was about to land on its ferry flight in from Coventry while at the same time, one of the DC-3s and the Connie were returning from an VFR aerial foto flight. Just at this moment, the crew of a Lufthansa Cityline Canadair RJ came on the tower frequency.

CLH: Zurich, guten Abend, Lufthansa xxxx on finals for rwy 14.
Zurich Tower: Guten Abend, Lufthansa, continue approach, you're number two behind a DC-6. There's VFR Traffic on 28, a DC-3 on short finals and a Constellation in the downwind.
CLH (after some silence, in a chuckling voice): yes, sure, roger.

A while later, the South African DC-4 made some sight seeing flights from nearby Basel Airport, before returning home:

SAA: Springbok 4xxx, requesting start up.
Basel Ground: Speedbird 4xxx, bon jour, push back and start up approved.
SAA: Sorry, this is Springbok 4xxx calling...
Basel Ground: Yes, Speedbird 4xxx, I said your push back and start up is approved.
SAA: Ehm, once again, sorry, we are not Speedbird (=BA). We are Springbok 4xxx, the DC-4 on stand Delta 11.
Basel Ground: OK. Speedbok 4xxx push back and start-up is approved.

At this point, Springbok shrug its shoulder and swalloed the ignorance...