I'm looking for replacement parts for my windows. They are about 40 years old. I see some on your site but not sure which ones I need. The only markings I saw on them was the 1720 stamped in the metal. Here are some photos. I need parts for five six windows. Thank you
Casey from SWISCO responded:
May 4, 2020
Hello,
Take a look at our S350-18 with a 1720 spring strength option. Please let us know if you have any other questions. Thanks for posting!