I was hunting a spot that use to be an old saw mill and i think i recall a piece of iron i dug that was very similar too yours may have been used in sawmill or logging, only a guess though. Good luck!
Nokta FoRs Gold, a Gold Cube, 2 Keene Sluices and Lord only knows how many pans....not to mention a load of other gear my wife still doesn't know about!
Looked at a bunch of "vintage chest latches" on Google pics, and I'm in agreement with Breezie. The others could
have been support for the other areas of the trunk. Not definite, but very plausible.
hmm, i did find these near them, Steamer trunk embellishments? The are seems to be a surface dump, lots of tin, a small amount of broken glass and crockery.
This explains the perty bits. I bet the the parts I originally posted were meant for substructure support. Maybe the tags were used for assembly and weren't visible due to a liner or such.