This is a 5 Pfennig green Bavarian stamp originally depicting a farmer at work, issued during the Bavarian period. After Bavaria’s postal system was absorbed into the German Reich in 1920, existing Bavarian stamps were overprinted with “Deutsches Reich” for continued use. Such transitional issues mark the political and postal shift from independent state issues to unified German Reich postal authority. Postmarked examples like this one highlight genuine period usage. A fascinating item for collectors of German States, inflation-era postal history, and overprints.