Tom from SWISCO responded:
August 19, 2022
Hey there, thanks for reaching out to us. Your knife latch is unfortunately a little too old for us to supply. The only thing we have that may work is our more modern 70-143P, though the design is a little different and I cannot guarantee that it will work. Pella is a little particular about these parts and what can replace them. Typically you aren't going to have a lot of wiggle room for alternatives, even other Pella parts. The idea is that if something breaks, you have to go to them and buy a new window instead of one tiny part. All that said, the 70-143P is very close in design and I think it's worth considering. If you wanted peace of mind, you can see our return policy here. Otherwise, you may want to check with local screen shops that deal with Pella hardware. If they work on Pella screens regularly then they may have this old version laying around that you can use. Just something to consider if you're in a desperate situation. Alternate image for 70-143P
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