Hi,
In the Indian army badges books of the first war, it is said that there is no insignia for the 111 Mahar. After searching on google, I found this paragraph written in 2012 by R S Sawdekar. I quote:
During the First World War - Mahar 111 was introduced and on cap badge "Kore" and "Gaon" was written on both sides of the Koregaon Pillar showing in the center, And at the bottom of the Pillar "Mahar" was written, while shoulders were shown with figure "111" and at the bottom was written "Mahar". This was with Mahar's unit from 1914 to 1918.
I have a badge that looks like this. Here are the photos.
Badge of collar or cap badge?