"1st Quality/W T & Co. 21 Med loan OC/=, 2500 s.a.p. 3. 1894" and a further non-perforated example dated in pencil "January 21 1893" and marked "1st Quality"; also 2½a., 145x82mm., two examples each dated and marked "2nd Quality"; all four affixed to card" /> Proof cover 1893 2½a., 141x78mm., perforated "SPECIMEN/B.W. & CO/LONDON", endorsed<I> "1st Quality/W T & Co. 21 Med loan OC/=, 2500 s.a.p. 3. 1894"</I> and a further non-perforated example dated in pencil<I> "January 21 1893"</I> and marked<I> "1st Quality"</I>; also 2½a., 145x82mm., two examples each dated and marked<I> "2nd Quality"</I>; all four affixed to card | Christie's