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I can't see it that well, but it
almost looks like runes from
the dragon language. I don't see any exact matches for the one in the middle. That would be the only thing making sense in the lore for a Nord, anyway, and it doesn't look like Daedric or Dwemer, and it wouldn't make much sense for either of those. (The wiki
appendices has some cool info on the alphabets of Tamriel. Albeit a bit broken, given our limited knowledge of Tamriel linguistics, let alone orthography!)
Or it's just old fashioned runes, which is possible.

Huzzah!
"[...] for the lives of gods are not what mortals think and matters that weigh only years to mortals weigh on gods forever."
The Tribunal Temple, Nerevar at Red Mountain
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