The distinctive sound at the start of the song is the marimba. According to biographer Carl Magnus Palm, the instrument was incorporated at the last minute, added after Benny Andersson found it in the studio and decided its "tick tock" rhythm was perfect for the track.
The song was ABBA's first number one in the UK since 'Waterloo' in 1974. As of September 2021, it is ABBA's seventh-biggest song in the UK with 860,000 chart sales (pure sales and digital streams).
The Dutch pressing had a beautiful sleeve, but in Germany and France different designs were used. It was nice to find these recently.
My collection: 7" single no. 5891 / 6759
Found: Discogs.com, received 31 January 2018 / 9 August 2022
Tracks: 'Mamma Mia' / 'Intermezzo no. 1'