Channel balances stamp

Thank you for your question. I see you are looking to possibly using the S385-27 channel balance as a replacement. For a channel balance stamped "26 6", you would want to use a 2660 option that holds a sash weight of 30--33 pounds. I hope this has answered your question. 

To review the different stampings on the channel balance, please refer to the sash weight chart listed on the product page.