6×30 Dienstglas marked ddx KF

Nice 6×30 Dienstglas in good used condition. The Dienstglas is complete with an early neck strap with brass studs. The Dienstglas is nicely marked ddx. which indicates production by Voigtlaender u. Sohn AG, Braunschweig. Nice 6X30 Dienstglas in good used condition!