I agree with Rob, that looks like a schedua top. A little bit unusual for its time, but was often seen on classic Alembics. My second guess would be bubinga. Whatever its origin, that made a nice-looking top! Also agree, maple neck, w/walnut stringers. Probably mahogany body core. I see the Volume/Pan/Filter circuit, a very user-friendly interface. The very Essence of an Alembic. I think you're going to enjoy that one.