Heinrich Köhler 383rd Auction – Day 7 Grand Duchy of Baden – Frankings and Postal History – The Klaus Peter Geis Collection Schleswig-Holstein 1850–1867 – The Rolf Beyerodt Collection

6 Kreuzer brown orange, large margins on all sides, with pen and ink mark and semi-circle cancellation "HAMMELBURG 31/5" (1850) on complete small folded cover to the well-known forest scientist Professor Johann Christian Karl Gayer in Speyer. The stamp (postage stamp) already unobtrusively pasted (purse stamp), otherwise perfect.