I don't think chess pieces would be labeled, they would be obvious on their own, otherwise you would have to lift up each piece to know what it was while you were thinking of your move.
Looks like wire or cable goes around it and maybe there's a second piece somewhere that slides over it to lock the cable in place. Something like that perhaps.
Looks like wire or cable goes around it and maybe there's a second piece somewhere that slides over it to lock the cable in place. Something like that perhaps.