A quick learner from St Catherine's ontario Canada says:
April 10, 2023
We moved into an old house at least 80 years old the window cranks are broken. The picture hopefully should show you what you need and the name on the arm was entrygard truth.
Thanks Ed
Casey from SWISCO responded:
April 12, 2023
Hello,
Take a look and compare the specifications of the 39-035 and 39-036 EntryGard operators to your assembly. We will include the dimensions from our product page below. Take a look and let us know if you need anything else. Thanks for posting!