Casement Hinge Needed

A home owner from Revere, Massachusetts says:
Truth brand
markings on existing hardware: 30751/30752, 30746, 30462
Thumbnail of the uploaded file named 20200926_112407.jpg
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Bob from SWISCO responded:

This looks like a casement window hinge. Take a look at our 36-004-10 Hinge Set and let me know if it matches up. 

A home owner from Revere, Massachusetts says:
Are these left hand or right hand hinges? We need to for a left hand hinge window and two for right.
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Bob from SWISCO responded:

These hinges are non-handed, meaning they work for either a left or right-handed window. They come in pairs so you can replace both the top and bottom hinges in a given window.

A home owner from Revere, Massachusetts says:
If they are non-handed, how do you get them to open in the correct direction? Do you have to take them apart??
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Bob from SWISCO responded:

The arms of the hinge come unattached to the base track so that they can be oriented correctly during installation. The video below shows how to install these hinge sets. 

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