Doc is right on. You got a fancy one, with the metal trigger. Most of them had a flat wooden trigger, that just slid in a trigger notch, and then was turned so the flat ears were against the raised arrow shelf, and notch, and the string was put over the flat ears, and when the trigger was pulled, it caused the string to rise up and over, whacking the arrow. The trigger looked like a double ended "T", or capitol I. Very simple, but it worked quite well. The bow wood I have seen, looked sort of like teak, or dark camphor wood, though I doubt it was either of those. May very well may have been rattan . My Brother brought home a carving he made, it was like Moai, (Easter Island statues) or what we used to buy to wear around our neck in the sixties, like a real surfer dude. Any way he carved one about three or four inches, and wore it on his helmet for his tour of duty there. The wood looked similar to the crossbow wood, or prod wood. Enjoy.
Wayne