3 covers, as well local letter franked with 1 Pf. the Berlin associate institute (Michel 2), registered postal stationery to 3 Pf. the Berlin package trip society with twice 2 Pf. (Michel 54), 3 Pf. (Michel 67 a) and 3 Pf. postage due note, letter vertical crease, rough opening at left and local letter from Hanover, franked with 2 Pf. MERCUR (Michel 19 a), letter vertical centered folded, all commercial mail