Unknown part

A quick learner from Stamford says:
Hi! I hope so one can help me find this part for this old window!Thanks. A million times.
Thumbnail of the uploaded file named IMG_0338.png
Thumbnail of the uploaded file named IMG_0329.jpeg
Thumbnail of the uploaded file named IMG_0328.jpeg
Thumbnail of the uploaded file named IMG_0338.jpeg
Profile picture of Lauren
Lauren from SWISCO responded:

Hello, thank you for posting,

If the circled part in your photos is all that is needed, please start by reviewing the 39-371 Pella hinge shoe pair. Compare the dimensions to confirm a good fit and let us know if you have any additional questions. 

Alternate image for 39-371
Alternate image for 39-371

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