I think it's The Whale by Roger McGuinn and it may well have been on the album Cardiff Rose but I'm not sure. I know I have a copy of it somewhere here
Assuming it's a copper-nickel circulation coin, 25 cents. The Panamanian balboa is pegged to the U.S. dollar at 1 to 1. "vn qvarto" is a Latinized spelling of "un cuarto", or one quarter.
The Panamanian Balboa is linked 1-to-1 with the U.S. dollar. Assuming you have a circulation coin and not a silver bullion piece, it's worth the same number of dollars as Balboas, or cents as...