I have 3 bw nasty's they were my set of demo ball's I got from hammer they are all like new. The only marks on the balls is the total span # in the middle of the palm to tell the balls apart. the 4 1/4" span is 14lb  i have a 4 1/2" span and a 5"span 15lb nasty . The thumbs are grip loc they do not come with a thumbsleeve just the outer grip loc sleeve in the ball.  Asking $75 each can fully plug for $90 shipped and paypaled to lower 48 only send me email for a pic..