German / Prussian Long Service Award for Non-Commissioned Officers

German / Prussian Long Service Award for Non-Commissioned Officers pre WW1 (1825 - 1913 issue) for 15 Years Service II. Class ((Militär-Dienstauszeichnung 1.Modell)
The Prussian Long Service Award for enlisted ranks and NCOs on active military service was instituted in three classes by the King of Prussia Friedrich Wilhelm III on June 18, 1825 in conjunction with the tenth jubilee of the Battle of Waterloo, known in Prussia as Schlacht bei Belle-Alliance after the inn “La Belle Alliance” that was used by Napoleon Bonaparte as his headquarters. It was also there that the Duke of Wellington and Generalfeldmarschall Gebhard Leberecht von Blücher met after the allied victory. The Battle of Waterloo ended with a victory of the armies of the Seventh Coalition (comprising that of Prussia) over the French army under the command of Napoleon. Militär-Dienstauszeichnungen 1.Modell (1825) were awarded to military active duty enlisted personnel and NCOs of the Prussian army and navy for nine, fifteen and twenty one years of service upon recommendations issued by commanding officers. As a rule, Long Service Awards of the 2nd and 1st classes were normally issued to long serving NCOs, while decoration of the lowest class was also awarded to certain categories of enlisted personnel (Mannschaften).
This clasp is bore centered cipher of Friedrich Wilhelm III, “F.W.” in capital Gothic letters and Roman numeral “III.”
A very hard to find service award!