Sigmar Polke's Roter Fische is valued at £3.5m-4.5m ($5m-6.5m) at Sotheby's.

It's set to provide one of the highlights of a contemporary art evening auction in London on June 28.

Sigmar Polke was a contemporary of Gerhard Richter

The enormous work measures four metres across.

It was executed in 1992 and is based on a drawing by the 16th century Dutch master Pieter Brueghel the Elder.  

Polke (1941-2010) was a contemporary of Gerhard Richter - the pair founded the influential capitalist realist movement together in Germany in the 1960s.

His record is $27.1m, set for a painting titled Dschungel (Jungle) at Sotheby's last year.

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