1912, airmail on the Rhine and Main, 10 Pfg airmail stamp as Air postage on post paid offical postal service card with notation \"free according to aversum no. 5\" from \"airmail on the Rhine and Main / Darmstadt 15.6.12\" to a members of the Landtag in Wölfersheim with seal of office \"second empire music chamber the trades / Grand Duchy HESSEN\" together with vignette, in perfect condition condition (on the back hinge trace extraneous), interesting and very scarce service use with the Rhein / Main airmail, in the Si. Unknown!