A postally used, registered commercial cover from the Mercedes Office of Machine Works franked with multiple copies of Sc 465-6 which commemorate the 7lh Nurnberg Party Rally. This cover was used twice for mailing inasmuch as a red Zella-Mehlis metered stamp is visible under the franking. (The corner card confirms this point of origin.) Nevertheless, the most recent mailing was from Bad Ems on 13 January 1936 to Nassau Lahn.
The Lahn River rises in the southern part of Westphalia and winds through the unstratified limestone and greywacke formations of the Rhenish Slate Hill District. Part of the river has been canalized, and numerous locks have been constructed to meet the rapid fall of the stream. The scenery vies with that of the most beautiful of the valleys of the Rhine. The features of interest include hills rising to a height of 800 feet above the floor of the valley, picturesque little towns and ruined castles.
Bad Ems is situated on both banks of the Lahn in a narrow valley enclosed bywooded rocky heights. It had a population of approximately 9000 in the early 1930s. Nassau, a town of some 3000 inhabitants is situated on the right bank of the Lahn. On the opposite bank of the Lahn rises a wooded eminence crowned by the ruined castles of Nassau and Stein.