Bob from SWISCO responded:
September 6, 2019
Thanks for writing in. This channel balance looks like it might be our S770-28. Your stamp code is from an older rating system for this balance; the safest thing to do would be to weigh your window sash. You can then match that exact weight with one of the weight ranges listed alongside each stamp option on the product page. If you need to replace the pivot shoe, please give us the width and thickness of the shoe, and we'll try and find the proper match. Many thanks. |