SG 626, 626a 1961 2d. Left marginal example. Error, ‘Orange omitted’. SUM. With Cert.

Great Britain 1961 Queen Elizabeth II  European Postal Conference. 2d. orange, pink and brown.  Left marginal example. Error, ‘Orange omitted’. Superb unmounted mint condition (with normal for comparison).  Brandon Certificate (2001).   Quantity : 5 mint.  EXTREMELY RARE.