Russian post office in China 3.50r black and grey pane of 25 used on piece and tied by 1916 postmarks. NO HIDDEN FAULTS – SEE PICTURES! All items are exactly as shown; please carefully check the pictures. Obtaining Certificates of Authenticity. Will be made after 60 days after the sale date unless extra time is granted. Due to the high cost of obtaining certificates. Stamps certificates from William T Crowe, The Philatelic Foundation, PSE, or the APS are accepted. Rates for regular letter and less than 1.75oz.