lot # 538 - russian po russian po
1908 Kitai overprint. 1908. Urga (28.1) to Kalgan. Red-band cover franked with 7k arms overprinted Kitai, tied by Urga type 4 cds. Hellrigl reported "in all, 30-40 covers bearing stamps with 'Kitai' overprints are known from Urga during the period from 04.06.1907 to 25.10.1909.