This famous weekly series started broadcasting on 22 September 1970 and ended in 1988.

This was Episode 150.

ABBA performed Waterloo to playback.

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.

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

Running order of this episode:

1. Jobriath - I'm a man
2. Jobriath - Be my day
3. Michael Elo - I loose the beat on you
4. Blue Swede - Hooked on a Feeling (NOTE: Björn Skifs was lead singer of this group!)
5. Terry Jacks - Seasons in the Sun
6. ABBA - Waterloo
7. Mud - Tiger Feet
8. Left Side - Mamma Mia (perhaps where they got the idea for a song of their own!)
9. Golden Earring- Instant Poetry
10. Slade - Everyday

This programme was broadcast on Monday 29 April and repeat on 27 December 1974 Toppop Jaaroverzicht 1974, AVRO, Netherlands.

TopPop (Waterloo), 1974;
TopPop (SOS), 1975; 
TopPop (New Year Greeting and interview), 1976;
TopPop (Björn), 1979; 
TopPop (Frida), 1982; 
(TopPop (Gemini - Just Like That), 1986);

Thanks to Jozsef, Dustin, Terry Malloy, Carl Magnus Palm, Erik Liebstaedter, Jozsef, Harold Hanlon, Diego Quaio, Philip Muyjtens, Philippe Michon, Loraine Minchetti and Ken Griffin.
YouTube link c/o TopPop