Look's like a raised medallion, it's been wet, looks like mildew. Cocabolla or walnut riser and maybe a maple site window, with white belly glass. I'd say a 61 or 62, $24.95, new
. By a cleaner from Walmart called Goo Off, and scrub it with that to see what you are working with, first.
And looking more at the Pearson put a string on and shoot it without cutting the knocks of. A string should stay without twisting to the side.