The Banksy artwork Oh My God could fetch up to £1 million during a sale this week.

Works by the anonymous street artist and the painter Frank Auerbach have gone on display at Bonhams ahead of the auction house’s sale of post-war and contemporary art this week.

On My God is estimated to sell for between £700,000 and £1 million.

Bonhams Post-War and Contemporary Art sale
For Edward 1984 by Howard Hodgkin (Aaron Chown/PA)

The 2006 piece was first shown at Banksy’s Barely Legal exhibition in Los Angeles, his debut in the US, the same year.

It features the wording: “Oh my God, that’s so cute. The way you just draw on stuff and think about yourself all the time”, and is accompanied by a certificate of authenticity issued by the so-called Pest Control Office.

It is one of the works that will go under the hammer on Thursday October 22 at Bonhams’ New Bond Street location.

Bonhams Post-War and Contemporary Art sale
Untitled, 1987 by Peter Schuyff (Aaron Chown/PA)

JYM Seated in the Studio VI, by German-born British artist Auerbach, dates from 1988 and was selected by the 89-year-old to appear in his landmark Tate Britain retrospective in 2015.

It has an estimate sale price of between £380,000 and £450,000.

Auerbach arrived in Britain as a refugee in 1939 at the age of eight, making a name in 1950s London alongside Francis Bacon, Lucian Freud and David Hockney.

Bonhams Post-War and Contemporary Art sale
Weston Super Mare 1999 by Banksy (Aaron Chown/PA)

Other works on display include Christo’s Store Front (Project) from 1964 and Howard Hodgkin’s For Edward from 1984.