China 1917, block of five mint never hinged stamps from the Russian Post Office in China, featuring the overprinted $1 denomination on the imperial Russian definitive bearing the double-headed eagle coat of arms. Printed in medium sienna and light brown by typography at the Reichsdruckerei in Berlin, the stamp was perforated comb 14 x 14½ and used in Russian-operated treaty port post offices throughout China during the final year of the Tsarist regime. This high-value overprint reflects Russia’s adaptation of imperial postage for Chinese currency in local mail operations. Catalogued as Scott Ts.3 52, Michel RU-CH 48, Yvert et Tellier RU-CH 49, Stanley Gibbons RU-CH 55, and Unificato RU-CH 49. The block is well-centered, fresh, and in excellent post office condition with full original gum. Estimate "$260 – 320"