casement window operator

A home owner from Cary, NC says:
September 19, 2017
I have wooden casement windows and need to replace some of the operators. I have attached pictures of what I have (they are either 9 1/2 inch or 9 3/4 inch arms I think). They are original to the house and are from the early 1970's. I have not been able to locate this exact match and would like your help in identifying it or a suitable replacement.

Thank you for your time and help with this.
Tim
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
September 25, 2017
Hello! I have also come across your type of operator in other discussions. I suggest looking at our 39-027E along with the related parts to see if you could adapt this operator to your window. Your hardware is very old, so there is no guarantee this will work.
Ellipse Style Single Arm Operator, 9-1/2"
Ellipse Style Single Arm Operator, 9-1/2"
39-027E
$20.70
Ellipse Style Single Arm Operator, 9-1/2"
Ellipse Style Single Arm Operator, 9-1/2"
39-028E
$20.70
Crank Handle, 11/32"
Crank Handle, 11/32"
39-114L
$4.42
Truth Folding Crank Handle, 11/32"
Truth Folding Crank Handle, 11/32"
39-205
$11.70
11-3/8" EntryGard Track, 4 Hole
11-3/8" EntryGard Track, 4 Hole
39-505
$3.70
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