Great Britain 1924 9d pale olive green (Watermark Inverted), SG427wi.
A very fine unmounted mint, with full original gum, bottom left hand corner marginal 'A24' control block of four.
A scarce King George V watermark variety, particularly in such pristine condition as a control block of four.
GB Specialised Catalogue No: N43(2)a.
Stanley Gibbons catalogue value: £700++.
