Probably made in the 1920s from Hawaiian koa wood. Nunes was one of the early Hawaiian makers. Worth a few hundred dollars if in decent playable condition (I'd guess $3-400, but I don't know the US market).
The pictures suggest that it doesn't need much refurbishment, assuming the action is OK, unless there are issues your pictures don't show.
The gap at the neck joint is ugly, but the picture is not clear enough to show whether that's really cosmetic. I think these were Spanish heel construction, so f there's no movement of the sides there it wouldn't suggest the neck is about to fall off.
I suspect the bridge is a mahogany replacement for the koa original, but it's similar in shape and so I could live with that if it's a player. The violin pegs look as if they've worn the peg holes over the years - either plug and re-drill, or find some friction tuners which are drop in replacements.
Otherwise, some buffing up with wax polish and it should sing out nicely.