O 17/15 OC 00" bridge c.d.s., on reverse "BASE OFFICE" (22/10) (Proud D2) and arrival c.d.s. A fine and rare use of unoverprinted adhesives. Photo " /> cover 1900 (15 Oct.) envelope from Wei Hai Wei to Hong Kong bearing unoverprinted 1a. tied by a good strike of the "F.P.O. N<V>O 17/15 OC 00" bridge c.d.s., on reverse "BASE OFFICE" (22/10) (Proud D2) and arrival c.d.s. A fine and rare use of unoverprinted adhesives. Photo | Christie's