1 Groschen carmine, large shield as correctly franked single franking - considered by itself nothing of note, by this document is however following special feature before: the cover of the company Gustae Vernier Belfort (H Rhin) France at Monsieuer Oscar Drumm Mulhouse, German Reich was to the postage saving of the German Reichspost hand over. He is with a 1 Gr. stamp, the postage for domestic letters franked. These was at destination with the horseshoe cancel "Mulhouse i. ELS " entwertet., photo expertize Brugger BPP: "postal history interesting document in excellent condition. "