on 4c. pink, a block of four showing variety surcharge on back and on front, fine used. Rare. S.G. 63b, £2400. Photo" /> used Block of Four 1892 (Mar.)<I> "1/cent."</I> on 4c. pink, a block of four showing variety surcharge on back and on front, fine used. Rare. S.G. 63b, £2400. Photo | Christie's