Four early works of elusive British artist Banksy will go on sale at an auction next month, joining the artist’s Flower Girl piece, Julien’s Auctions said yesterday.

The four graffiti works include Happy Choppers, a 2002 mural that first appeared on a wall at the Whitecross Street Market in London and features a stenciled group of military helicopters, one adorned with a pink bow.

The piece is estimated to fetch between $150,000 (€111,870) and $200,000 (€149,160), and will join the sale of Flower Girl, a stencil work that first appeared on a Los Angeles gas station wall. It is expected to fetch between $150,000 and $300,000 (€223,740).

Beverly Hills-based Julien’s Auctions said the auction marked the first time that Banksy’s public street art had gone on sale in the US. The works were all put up for sale by private owners whose identities remain confidential.

Also included in the sale are two other works from Banksy’s 2003-2004 tour in Germany, which were discovered on walls in Berlin. TV Girl features a stencil of a girl holding a television set with an orange heart on the screen, while Umbrella Rat depicts a rat dressed in a bowler hat and tie, parachuting with an umbrella.

The final piece to be added to the collection is a 2003 work called Black Bobby, from Banksy’s tour in Sydney, Australia. It features a silhouette of a British policeman writing a ticket and is valued between $20,000 and $30,000 (€22,374).

Banksy is the pseudonym of a graffiti artist who first emerged in Bristol, England, as part of an underground group. He hides his identity and real name, and his works have become collectors’ items, prized for their trademark spray-paint stencils and offering social commentary.

The artist appeared in the 2010 Oscar-nominated documentary Exit Through the Gift Shop with his face obscured and voice altered. His works are verified through his website (www.banksy.co.uk).