A contractor from Syracuse says:
052-275712 warranty info
Po is 2963
Date is 3/4/03
35 1/2x45
Series 0401 double hung

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Casey from SWISCO responded:


The 15-175 pivot shoe in your photo is compatible with our 1/2" wide series 152 coil springs. If your coils don't have any numbers included in the stamp, you'll need to weigh the sash and divide the weight by the number of coils on both sides of the window to choose the correct stamp option. Thank you!

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