Exhibition: RCA Secret, Royal College of Art, London, November 18-26 2011
If you've got an eye for the sort of work Tracey Emin, Anish Kapoor, Grayson Perry or even the less artistically-renowned Sir James Dyson might commit to postcard, the RCA's secret fundraiser is the gig for you.
For £45, you can pick a miniature artwork from a wall, then turn it over to reveal the signature of the artist on the flipside.
All the proceeds help emerging artists, and other high-profile contributors in the 17th year of the idea range from John Baldessari and Yoko Ono to Sir Paul Smith, David Bailey, Mike Leigh and Nick Park.
You can take a few looks before the actual sale day on the closing Saturday, with the involvement of more than 2,000 artists making the potential procurement of a masterpiece an even more satisfying prospect.
- Open 11am-6pm (9pm November 24, 8am-6pm November 26). Admission free. Visit Secret online for more.
More pictures of the mystery works: