Toppop                        

Episode 150: ABBA performed "Waterloo" to playback.  This DOES still exist in VCR (Video cassette recorder) format only from the original TV broadcast.

As far as I can tell, this is the only time these (dreadful!) outfits were worn on a TV show.  ABBA were introduced by Ad Visser who 8 years later interviewed Frida

Here's a proper (colour) image of the performance taken from a book and here in black and white and an alternative in colour.

ABBA were featured in a book about Toppop and a picture from this session was used.

Running order of this episode:

Jobriath - "I'm a man"
Jobriath - "Be my day"
Michael Elo - "I loose the beat on you"
Blue Swede - "Hooked on a Feeling" (NOTE: Björn Skifs was in this group!)
Terry Jack - "Seasons in the Sun"
ABBA - "Waterloo"
Mud - "Tiger Feet"
Left Side - "Mamma Mia" (perhaps where they got the idea for a song of their own!)
Golden Earring- "Instant Poetry"
Slade - "Everyday"