1850, Baden uprising, complete Militaria-letter, content city Donaueschingen to close with red two-line cancel \"CONSTANZ 13 Mrz. \" and prussian double circle postmark \"field post D. 3. Army CORPS\", reverse red seal stamp \"Prussian Armeecorps in Baden\", covers from of Baden uprising with of Baden and Prussian cancel are comparatively rare, transport traces.