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SG11a. 1906.

1c Black and purple. 'Overprint in Black'.

The fantastic top right sheet number marginal block of four, in superb fresh mint condition with beautiful colour and perforations. The top pair are UNMOUNTED.

B.P.A. Certificate.

Ex. Col.J.P.Danson (June 1971), Christie's (December 1994).

Unique and Spectacular.