WHBM - this is to ignore Euroberlin - not to be confused with Air Berlin - isn't it? Input Euroberlin France on Wikipedia for further info.
I positioned Boeing 737-3YO G-MONH from Luton to Berlin Tegel on the evening of 6th November 1988, reconfigured with the new Lufthansa cabin interior: 20 business, 98 economy. We flew out on an Air France something something 'Victor' callsign, and operations commenced next morning with the Eurobear callsign. 'NH was one year old, the other three initial 737s were brand new.
"Euro - what?" said the American ground controller at Tegel. "It's their funny way of saying Looft-hansa" said a deep drawl from a PanAm 727. (The 'bear' bit comes Berlin's mascot.)
Oh and this meant I was in Berlin the night the wall came down ...