O 2" barred obliterator and showing, on reverse, a good strike of the Civil P.O. "CHAMAN" c.d.s. Rare. Photo" /> cover 1881 (1 June) envelope to London bearing ½a. and 4a. both tied by good strikes of the "F. N<V>O 2" barred obliterator and showing, on reverse, a good strike of the Civil P.O. "CHAMAN" c.d.s. Rare. Photo | Christie's