Music: Piano Played On ABBA's Hits Up For Auction

A GRAND piano that featured on many of ABBA's biggest hits is going up for auction in London next month.

SOTHEBY'S is offering the instrument, owned by the Stockholm music studio where the 1970s Swedish super-group often recorded.

The auction house said the piano by Swedish designer Georg Bolin - played on hits including Waterloo, Dancing Queen and Money, Money, Money - was expected to sell for between STG600,000-STG800,000 ($A1.31 million-$A1.69 million) on September 29.

It's the first major piece of ABBA material to be auctioned, and comes with a certificate of authentication signed by band member Benny Andersson who described the piano as a "great source of inspiration".

Sotheby's specialist Philip Errington said predicting the price was tricky, because little ABBA memorabilia has ever come to market.

He said the piano might appeal "to an ABBA fan, or to somebody who wants to have an interesting conversation piece. It is incredibly difficult to judge what it might make."