Not at all Rumpel!!!
If I could even remotely estimate how many things completely go past me, and I've been at this stuff a couple of years or so
There are so many dialects and languages in India's subcontinent and of course the influences of many outside sources it is a real challenge to tackle many of these markings.
I agree that Gurkmukhi is a good fit, and a Punjab oriented script which was most notably associated with Sikhs. This example may well be associated with Sikh arsenal stamps or other numeric significance which I would defer to those most knowledgeable on those topics.