This exhibition has finished.
Cost: Free of Charge
The world's most expensive stamp - nicknamed "the Mona Lisa of the stamp world" - is on display for a few weeks at the London store of its owner, Stanley Gibbons.
The British Guiana ONE CENT black on magenta cost $8.3million when it was sold earlier this year.
The stamp, printed in black on magenta paper and measuring 29 x 26mm, features a three-masted sailing ship, as well as the motto "Damus Petimus Que Vicissim" which translates to "we give and expect in return".
Stanley Gibbons has created a series of exhibits around the 1c Magenta and its history, and visitors can learn about the stamp's owners - from schoolboys to shoe designers, and murderers.
Weighing one-twentieth of a gram, gram-for-gram it is believed to be the most valuable man-made item in the world, at £120m per gram.
Ian has Visited - review here.
Contact and Booking Details
More information at this website.
No need to book tickets - just turn up on the day.