I believe it is Koa but if I was you I would wet it down. Take picture of it and google Koa slabs and compare it to your picture.
However if it is koa you have a chunk of wood that depending on how much figure it has it about 300 to $500. Let alone it being seasoned for 35 years and it being one of the Islands favorite woods for ukukeles.
Why would you want to just make three lap guitars?
Tunnel vision. Suggestions? Right now I'm thinking of at least making a baritone out of it.
Well the pores are more open then I thought they would be. So it might be monkeypod. So here's what I am seeing. Koa and monkeypod are similar, let me see if I can express it another way. Koa would like a shallow stream gently going around the rocks in its path. Monkeypod would be a faster moving stream with water going over the rocks making more swirls and eddies.
So if it is monkeypod then I would say it does not have a lot of figure. If it is koa it has some nice figure. But with the grain like it is it gonna take some bar top epoxy to fill the pores and keep it looking like you just pored water on it.
Just curious, did you click on it and look at it full size (zoomed in)? I'm no expert, but damn, that looks like pretty swirly to me...