Which aircraft had different logos on 2 sides?

[Speedbird1]

I've been spotting for years. I was wondering which aircraft had completely different livery on their 2 sides? What comes to mind for me was Concorde G-BOAD which had British Airways on 1 side and Singapore Airlines on the reverse for about 1 year. I also recall when the old National merged with Pan Am, each side had a different livery. Also the ANA Pokemon B747 had different "monsters" on each side. Which other airlines had 2 liveries ? Never saw this question here before?

[JHNA57]

I think KLM-VIASA shared a 747 for a while many years back

[Mateo]

There are also the airlines that have titles in English on one side and native language on the other. Royal Air Maroc and Air India come to mind right away, but I'm sure there are others.

[Tom_Turner]

I think KLM-VIASA shared a 747 for a while many years back

I didn't know about that one, but they did this with a DC-8 at first (standard fuselage length) and later with the "Super DC-8" as well. Both were frequent visitors to JFK at the time.

[Tom_Turner]

Alitalia and Continental teamed up to do a double livery, one on each side, on a DC-10, back sometime, I am going to guess, around 1999. It was commonly seen at EWR.

[Tom_Turner]

I also recall when the old National merged with Pan Am, each side had a different livery

I missed that one. Guessing it was "one-off" of course. Do you recall the aircraft type?