Great Britain Queen Elizabeth II SG 1978 British Architecture Miniature sheet, SG1058d.
A very fine unmounted mint full original gum example with orange-yellow (affecting the 10 1/2p and 13p) omitted. Offered with normal for comparison.
An extremely rare modern stamp error with Pierron recording only circa 6 examples.
Accompanied with a 1997 Brandon Certificate of Authenticity.