Hello there!
Your balance appears to be a match for our S795-27. This comes attached with the 15-195 closed cam T-lock shoe by default but you have the 15-195B open cam shoe so you'll need to purchase this separately and then snap it on once you get them. The video below will demonstrate how to do so. Your 26-5 stamp doesn't match any of our options, however. Our 27E stamp may be what you want, but you should weigh your sash on a scale to confirm. Two balances with a 27E stamp can carry 26 through 30 pounds. As long as your sash falls in that range then you're good to go.
