British Guiana 1c Magenta: £6.2m ‘Mona Lisa of the stamp world’ goes on display to the public in London
The world’s most expensive stamp – nicknamed “the Mona Lisa of the stamp world” – has gone on display to the public.
The British Guiana 1c Magenta (1856) was bought for $8.3m (£6.2m) by rare stamp dealer Stanley Gibbons at auction in June.
It was flow…