4c on 2c Offices in China (K2). Mint N.H. with top plate no. F 13541 selvage, exceptionally well-centered, deep shade, Extremely Fine Gem, ex Hinrichs, with 2019 P.F. and 2006 P.S.E. certificates (XF-Superb 95; SMQ $450.00), only three grade higher (at 98)