Great Britain 1969 Queen Elizabeth II British Ships. 9d. red, blue, ochre, brown, black and grey. Left marginal se-tenant strip of three. Variety, ‘Blue omitted (affects first stamp)’. Superb unmounted mint condition (with normal for comparison). British Philatelic Association Expertising Certificate No. 72,891 (2008). AN EXCEEDINGLY RARE AND ERROR OF WHICH ONLY CIRCA 40 MINT STRIPS EXIST.