Thanks very much Mark! I was hoping you'd catch this ,Cap'n !!

I agree with the mountain artillery assessment, which are also vaguely documented and seem to have a degree of variation, as in India was of course quite typical in widespread and often remote regions. These were usually, as I understand, carried by havildars of these units, and I have one which is mounted with a M1796 light cavalry blade.
While it is of course pretty tough to accurately place this example in any one category, it is of the type used in these other ranks range circumstances and various auxiliary units, even the Hospital Corps used these kinds of hangers.