1902 (15.3) Meched Provisional: Envelope addressed to London, England, franked 12ch. blue with red initials, neatly tied on reverse of envelope by MECHED/15.3 (inverted date), GAOUDAN/16.3 transit exchange PO and the Russian Gaudan alogside with a faint Moscow pmk on the front, the stamp has got some printing errors, an extremely rare cover usage of the 12ch. value and especially rare as this cover is addressed to an overseas destination