this is a solid spruce top with the wood grain running parallel to the strings. but, the wood underneath the bridge appears to be running in the other direction. further, if you look closely at the region that ripped off, it seems like there is wood underneath it - and it seems like it's running in the right direction.
i strongly suspect that somebody placed some kind of particle board underneath the bridge.
but, it opens up the question - why?
the most obvious reason is that it needed some support, because there was a crack under it. the less obvious reason would be to raise the action, or otherwise "protect" the finish.
so, this is a difficult choice. if i want to do this right, i want to rip the particle board out. but, i risk exposing whatever the particle board was intended to support.
i want to see if i can find an example. but, the wood looks weird...
the flip side is that if there is a particle board underneath, and it was there to protect the original finish, i guess it did it's job, right? it would mean the wood i pulled up was meant to be damaged.
but, that's only important if the glue job is shoddy, and we're not making that mistake again. if i can get to the actual wood, and it doesn't need the support, i'd rather do that.
i just don't know how to prove it's an addition - and i fear the consequences of my intuition being wrong.