Yes, I have owned one just like it for many years - and, I do not know what it means.

It is a full-military stock, in a bit lesser condition, with the same heavy "HH", and, IIRC (it's not handy just now) a legible 1902 cartouche. I'm also sure I've seen the same stamp in conjunction with a "JJ" mark. I've never spoken with anyone (including the late Bill Mook) who knew what it was.

The metal it came with (which COULD have been 482440, unfortunately that is not now verifiable) did not match the stock date, however. This might indicate that the mark is indicative of some sort of refurbishing - arguing against that, however, is the fact that the metal of 482440 is extremely nice, far better than the stock in question. Somewhere, long ago, I acquired a very nice 1902 (1903 would be a better match, but have never found one) stock for it, where it resides today.

I'm a (relative) late-comer to Krags, only getting really serious about them when the list of trapdoors I "needed" became hopelessly out of reach. I'm sure I passed over some good ones, when I was so narrowly focused on TDs.