Banksy Peckham Rock postcard The wooden postcard featuring the Banksy Peckham Rock, brilliant sold-out edition of Banksy's Peckham Rock sneaked into the British Museum by the artist in 2005 as an official display, nobody noticed it until 3 days later when some body spotted it! fantastic investment and can only go one way. The wooden postcard of Banksy’s ‘Peckham Rock’ wall art has been authorised by Pest Control/ Banksy for the British Museum as part of the object exhibition. In very good condition. Copy of receipt included