A quick learner from Pittsburgh says:
Looks like the stamp is 10J, which is not listed for this design, please advise. Thank you
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Casey from SWISCO responded:


Take a look at our 15-192 pivot shoe that is used with the 3/4" wide Series 170 and Series 171 coil springs. I would recommend weighing the sash and dividing the weigh by the number of coils in the window to choose the correct stamp options to support the sash. Thank you!

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