Agriculture, German Reich 1928, decorative envelope \"34. Agricultural Wander exhibition Leipzig 5. To 10. June 1928\", as registered mail with 5 Pfg Schiller and 40 Pfg Leibnitz free done, both stamps punching the \"D. L. G. \" (German agriculture society Berlin), with postmark \"BERLIN SW 11 14.5.28\" to Leipzig (arrival cancel), envelope above middle small fissure