Vent stop replacement

A home owner from New jersey says:

Window manufacturer is unknown - No markings or labels on the windows. Only markings on vent stop is "4" and "patent pend". Measurements given on pictures of replacement vent stops are unfathomable as in I am unable to translate the cm and inches of my ruler to measurements given in the pictures. Any assistance will be greatly appreciated.

Regards, Susan 

Thumbnail of the uploaded file named vent latch installed
Thumbnail of the uploaded file named full view of broken latch
Thumbnail of the uploaded file named empty hole specs2
Thumbnail of the uploaded file named empty hole specs
Thumbnail of the uploaded file named pat pend stamp
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Emily from SWISCO responded:

Hey there, Susan.

Thank you for contacting us. Unfortunately, we don't sell an identical match for this vent latch. The 26-122 is similar in design though I can't promise it will work for you. Take a look and see if the specifications meet what you need. 

Alternate image for 26-122
Alternate image for 26-122

Side view of 26-122
Side view of 26-122

Diagram of 26-122
Diagram of 26-122

How to Replace a Window Vent Latch
How to Replace a Window Vent Latch
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