Need pulley type window balance

It looks like you have a very old Capitol window. I would recommend our S370-17 channel balance. The little nylon attachment on the back of your old balance shoe was our likely an old riser. We did carry one at one time, but I'm afraid they're no longer available. You will need to unsnap it from the old balance shoes and snap them on the new balance shoes. I also recommend the 1610 stamp, yes.