MG08/15 help with markings

[Surpmil]

603 G (b?) doesn't appear in the war trophies list. It may have been brought back after the war, or by returning officers for a particular regiment's collection.

Post up the other serial numbers and we'll see what can be found.

Don't recognize the "CAG" monogram; the Adjutant General's department isn't known for battlefield captures.