UBB.threads Forums Uniform & Accessories Imperial German Uniforms, Orders, and Decorations Newby Shoulder Board ID

My information is that red with yellow lettering came with the 1916 regulations. Prior to that, Baveria used blue and red. Here is a link to a list of all German Imperial artillery regiments active during WW1 - https://en.wikipedia.org/wiki/List_of_Imperial_German_artillery_regiments.