(REUTERS) - Four life-size Abba silicone figures in a crate arrived by helicopter to the roof of the Abba museum in central Stockholm on Tuesday.

The four dolls will become a permanent exhibition in the museum along with holograms and memorabilia on display.

Abba, made up of Bjorn Ulvaeus, Agnetha Faltskog, Anni-Frid Lyngstad and Benny Andersson, shot to fame when they won the 1974 Eurovision Song Contest with the song Waterloo. The group became one of Sweden's biggest exports with hit songs like Dancing Queen and Gimme! Gimme! Gimme!, selling around 370 million records in total.

Since the members have repeatedly said there will never be a reunion, this may be the closest to the real thing fans will ever see.

Maker of the figures, Goran Lundstrom said portraits - especially from a different time era - were always difficult, no matter what material they were made in, and the hardest part was getting the character's gaze right.