I second DM. If they’re signed, it means Melody took a pen/marker and signed the felt on the bottom. All Windstones have the logo on the felt, and “Pena ‘XX” where the XX is a year…86, 88, etc. carved into them.
Some ebay auctions, where the seller is a non forum member, or just not so informed, say “This piece is signed!” but they’re usually talking about the carving into the statue.