Broken handles

A home owner from Waukesha, WI says:
I don't know the manufacturer of these windows. The house was built in 1957. I suspect they are Anderson's. I have 5 of these awning windows, 3 of them with broken handles which makes it nearly impossible to open them. I have no idea how to get the mechanisms out of the frame. I can remove the windows themselves easily.
I'm looking for advice on how to get the mechanism out to help identify what kind of mechanism I have and order replacements.
I'm hoping you can help.
Thumbnail of the uploaded file named 20210515_121212.jpg
Thumbnail of the uploaded file named thumbnail_20210515_121232.jpg
Thumbnail of the uploaded file named thumbnail_20210515_121239.jpg
Profile picture of Casey
Casey from SWISCO responded:

Hello,

We can't say for sure without seeing the operator arms that move the window sash in and out but you might need one of the lever operators we've related for you, depending on the dimensions. 

Also, keep in mind that in some cases it may be necessary to remove the window sill trim that covers the operator base to uninstall it. Thank you!

A home owner from Waukesha, WI says:
It would be the 39-069.
I was hoping you could instruct me on how to remove the sill trim. I have no idea how its attached (screws or nails)
Profile picture of Casey
Casey from SWISCO responded:
Take a look at our video below that will give you a general overview of removing the sill trim. The featured operator is different than yours but the trim removal should be relatively the same process. 
39-037 : Awning Window Lever Operator, 13-1/8
Awning Window Lever Operator, 13-1/8"
39-037
$75.77
VIEW >
39-069 : Awning Window Lever Operator, 20-1/2
Awning Window Lever Operator, 20-1/2"
39-069
$71.30
VIEW >
39-070 : Lever Lock Awning Window Operator, 23-1/4
Lever Lock Awning Window Operator, 23-1/4"
39-070
$78.45
VIEW >
Watch How To Repair A Casement Window Crank Operator
Watch How To Repair A Casement Window Crank Operator
VIDEO
WATCH >
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 4-7 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at 856-317-6263 or at help@swisco.com.