Bob from SWISCO responded:
November 12, 2020
Thanks for posting. Be sure to measure the metal channel to determine the length you need. Some older balances use different stamp codes; the safest thing to do is obtain the exact weight of the window sash that uses these balances, then match that weight with one of the weight ranges listed alongside each stamp option on the balance shop page. Please send us pictures of the balance if you're uncertain the stock Series 770 is exactly what you need. |