Svashtar,
With all due respect to your informant, I disagree. I have looked at half a dozen or more of these inscriptions, and they all follow the same pattern: "sri 3 chandra" [various spellings of 'chandra' (moon)] then one more word, then four digits.
Your friend is doing a good job of trying to make sense of an idiomatic inscription. '3' sort of looks like an 'om' symbol, and 'sri om' is a common combination in hindu mantras, etc. But 'sri 3' is the honourific formula for the Rana prime ministers (the real kings had/have 'sri 5' as their title). And 'chandra' appears on all of these AC kukris, and is (part of) the name of the ruling PM of the time (or so it seems).
The last word can hardly be 'gaNesh', though again your friend is obviously just trying to make sense of an obscure inscription. I agree, that the 2nd symbol could be 'N' rather than 'kh', but that still would make the word "gaNo", and not 'gaNesh'. And the last four symbols are definitely numerals, and not letters (your friend is taking the first two numbers and trying to read them as letters completing the word "gaNesh").
So, I still stand by my reading "sri 3 chandra gakho (or gaNo) 8123".
I have talked to John Powell about these AC kukri inscriptions in general, and his knowledge, and that of some of his Gorkha officer informants, seems to match this basic pattern.
Though the reading of Svashtar's informant is a laudable attempt at making sense of an obscure (and abbreviated) inscription, and I understand how he arrived at it.
cheers,.
B.