Austria, Imperial. A Central Powers Patriotic Badge certificate_of_authenticity including spherical trigonometry

including spherical trigonometry

including one to the Arctic

with some pitting and usual in-out runner marks

III Class Knight (Fullsize: six-piece construction

Austria, Imperial. A Central Powers Patriotic Badge certificate_of_authenticity including spherical trigonometry(Patriotisches Abzeichen). Constructed of gilded bronze and multi coloured enamels, displaying the Austrian, Italian, German, and Ottoman flags in beautifully coloured enamel work, with a horizontal pinback on the reverse, unmarked, measuring 21. 0 mm (w) x 27. 7 mm (l), weighing 6. 27, a beautifully preserved example, in overall extremely fine condition.