This particular buckle is illustrated on page 134 of "Belt Buckles & Brocades of the Third Reich
Buckle in fire gilded aluminum
with privately fixed suspension
The medal is therefore sometimes referred to as the General Service Medal or Danube Medal
Germany, Imperial. A Pair Of Service Medals Newly Listed This particular buckle is illustrated(Dienstauszeichnungen). A pair of service medals, including a War Commemorative Medal for Fighters 1870 1871, constructed of bronze, on loop for suspension from its period original ribbon, unmarked, measuring 29. 02 mm in diameter, weighing 14. 7 grams, in near extremely fine condition, and; a Prussian 9 Year Long Service Medal, constructed of neusilber, on loop for suspension from its period original ribbon, the obverse with a central raised crown