Auction # 71 - WORLDWIDE CLASSIC COVERS: Corti Riva archive, part 2, new finding

5/AU/1869 SAVERNE - Chiasso (Switzerland): Entire letter franked by Yvert 28B + 29, with "SP2º in dotted rhombus" cancel, also "PD" in small rectangle in red and in black, "PARIS A STRASBOURG 1º - H", and on reverse transit marks of Strasbourg and Basel, and Chiasso arrival, VF quality!