O 24/9 OC/4" single ring d.s. struck at the Mission H.Q. Gyantse and showing, on reverse, a good strike of the "BASE-OFFICE"" single ring d.s. Fine and rare. Photo" /> cover 1904 (9 Oct.) K.E.VII ½a. stationery envelope, with additional Q.V. ½a., to Devon, cancelled by two strikes of the "FIELD P.O. N<V>O 24/9 OC/4" single ring d.s. struck at the Mission H.Q. Gyantse and showing, on reverse, a good strike of the "BASE-OFFICE"" single ring d.s. Fine and rare. Photo | Christie's