China 1903, block of four from the French Post Office in Yunnansen (Yunnanfu), featuring the 4 centimes denomination from the Navigation and Commerce series with violet brown and blue color scheme. Overprinted “YUNNANSEN” for regional postal use, the design by Louis-Eugène Mouchon symbolizes trade and allegorical commerce, with classical figures representing colonial influence. Printed by the Imperial Printing Office in Paris using typography on grey paper, the stamp measures 20 x 24 mm and is perforated 14 x 13½. Cataloged as Scott Yun 3, Michel FR-IC B19VI, Yvert et Tellier FR-YUN 3, and Stanley Gibbons FR-YUN 3. This fine used block of four bears clear Yunnansen cancels, with well-matched centering and intact perforations throughout. Estimate "$140 – 170"