The genesis of this unique cover is well described by Karl-Rudolf Winkler in his article “AM-Post-Brief mit amerikanischem Stempel aus San Pedro” (German language) posted in the chapter “Publications”.
Collection K.-R. Winkler
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The genesis of this unique cover is well described by Karl-Rudolf Winkler in his article “AM-Post-Brief mit amerikanischem Stempel aus San Pedro” (German language) posted in the chapter “Publications”.
Collection K.-R. Winkler