16c on 8c Olive Green, Offices in China (K8a). Mint N.H., selvage at bottom, jumbo margins all around, rich color and a deeply etched impression, Extremely Fine Gem, with 1996 P.F. certificate for a block, with 2014 P.S.E. certificate (XF-Superb 95 Jumbo; SMQ $1,400.00)