Great Britain 1902 - 1913 sg232(?) - 3d purple on yellow, used "FO" pmk(ref 276)

I find it difficult to accurately ascertain the correct printer of the King Edward VII definitive issues, and therefore offer no suggestion myself of the relevant Stanley Gibbons catalogue number for this stamp. There is a pencil mark on the back of the stamp, endorsed by a previous owner, that the stamp is SG232, and I have relied on this for the title of this listing.

General perforation conditions can be seen in the above image. Abbreviations used in my listings are:-

(a) UMM = unmounted mint = MNH mint never hinged 
(b) MM = mounted mint = hinged mint. MM may also be used for stamps that would be UMM except for a small amount of gum disturbance approximating to a light stamp hinge effect on the gum.
(c) LMM = lightly mounted mint
(d) VLMM = very lightly mounted mint
(e) MNG = mint but no gum
(f) used = used

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