There are definitely a few Futhark runes, both forward and inverted, but they seem pretty out of context with one another.
Berkana and an extra-wide Dagaz in the top left of the latch-side, with Wunjo right below them, though Wunjo is backward and has those extra little dots to the sides, and has a horizinotal bar at the bottom? Another Berkana near the middle in the bottom row on the hinge-side, and a backward Laguz in the top row, but with extra little curls or dots at the tips.
Not counting Those first two as Fehu or Hagalaz, they seem too deliberately curvy.
As for the rest, I couldn’t find a single Theban letter in the lot. Checked them against Enochian and a smattering of Rennaisance-era magickal alphabets, as well, but nothing. Lots of very similar shapes, but they don’t seem to translate.
A few of them could almost be homemade sigils off of one planetary square or another, particularly the center two on the top row, hinge-side. For that matter, MOST of them could be homebrewed Sigils from whomever did the box. The top triangle does seem familiar, but like most of everything else, I couldn’t find a match.
Lightning bolts (Lid, left side) are all sorts of symbolic, as are Hexagrams. The twisty loop (Lid, right side) could be an Icthus, or an inverted Cancer ribbon. The big lace-looking pentagram surrounding the mysterious triangle sigil is, if nothing else, a pentangular symbol itself? Lots of possibilities there.
Do you have any more information about this box? Is there anything inside it, and has anybody opened it up? The latch, at least, looks practically new, and it could be telling that it’s only a hook-closure, not a heavy padlock situation. That might indicate that whomever put the box together expected to access its contents regularly.
On the other hand, the top and front are quite dusty, while the back is clean. Seems like it’s sat on a shelf against a wall for a long while, or for a little while in a really dusty environment.
I’ll be interested to hear about any further developments.