Hello Mike
As you probably know, the Kolar Gold Field Volunteers was a volunteer unit in British India. Formed in 1903, they became the 43rd Kolar Gold Field Battalion in 1917. The 1911 date does not appear to be of any special significance as regards, formation, change in title, disbandment and so on.
Perhaps one of our Indian Army specialists can shed some more light on the badge and date.
Regards
Roger
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