ST LUCIA 1891-92 ½d on 3d dull mauve and green error, SG56b

St Lucia 1891-92 ½d on 3d dull mauve and green, die II, error 'Surcharge Inverted', SG56b.

A very fine used example on piece with 'A11' cancellation.

A rare error.

Accompanied with a British Philatelic Association Certificate of Authenticity (1964).

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