I don't know the species, it was a Christmas gift from a great-uncle 30+ years ago. It's 16"x10"x5". Not very big, but should work fine for me. I've taken it with me every time I've ever moved but never really had a good use for it until now.
Agree with
@deluxestogie , the art bottom appears to be a totally different species, maybe a thin sheet with the scene burned into it. If it's not glued in and you can lift it out easily without damaging it, I'd take it out, stabilize it and frame it to hang on the wall so it can be seen. This may not be possible.
If it cannot come out without risking damage, I'd get some thin spanish cedar sheet and line the inside bottom of the box and top of the lid. Then, using 1/4 spanish cedar trim around the outside of the box and lid, construct mating lips that project out of the box into the lid to form the seal, much like the humidor that
@Knucklehead posted, just cleaner. If things are cut well, you won't have to use glue or brads, and you'll be able to return the box to original condition if you wanted to in the future. The interlocking wood lips interrupting the joint between the box and lid will be your seal. The lid should close with a soft cushioned whoosh when dropped from the open position.
(I assume the chest/wood species as is now has no strong smells inside or anything else that would make it a no-go)