By necessity, light troops needed to be highly mobile however, the established method for conveying orders on the battlefield (drum beat) was found to be too cumbersome and was quickly replaced by hunting horns, which were traditionally carried by German Jägers, and which could be used either as a musical instrument or, as a gunpowder container.
The term bugle originates from the French word bugleret, which was derived from the Latin buculus, meaning young bull The ancient European Wild Ox was called a Bugle and it was from this animal that German first obtained their hunting horns. Ancient European Ox Horn
Halbmond Horn Symbolically, bugle horns had for centuries been associated with hunters & foresters however, it was the Germans who first introduced the bugle horn badge and Jaeger (hunter) green dress into military uniform, one of the earliest Regiments, being the Prussian Field Jaeger Corps of 1744.
As time went on bugle horns were made from metal with the large copper semi-circular
The horn became a symbol for all Light Infantry & is correctly referred to as a Bugle Horn
Now I have the answer, the crown donates W/O rank, the crossed swords donates Physical Instructor and the buglehorns are just generic symbol for light infantry units (see above) His official rank was Company Sergeant.....so he was Company Serjeant/Sergeant 3302 Shaw P. D.C.M. & M.D.