320a (763b "a" var footnoted) 1958 2d on 1½d brown-lake Q Elizabeth II, ERROR - surcharge on Scott 290 (Stanley Gibbons 725), block of four, VARIETY - small diameter of dot (3¾mm), P.O. fresh, extremely rare as the vast majority of the errors were surcharged with a diameter of dot 4½mm, very few exist, listed but unpriced in Scott.
