Glad to see this story surface. Joel told me about this several weeks ago. The funny part is, there were many souviner stores visited on the trip, and this was the last one around, and you and your wife started not to stop there.
I'm glad you did, and that it worked out for you to get those bows.
Looks like a maple riser with four bamboo lams that are probably concave \\ convex. Also looks like a
linen string. What is it backed with? Could be trunk fiber paper.
Can you measure the amount of backset?