DYAD left hand casement window operator

A handy person from South Windsor CT says:
Arm marked 30866 and has 4.500: hole spacing, with 5.00" OAL. Base unit has 5" mounting hole spacing. Looks like the 39-188?
Thumbnail of the uploaded file named IMG_1037.jpg
Profile picture of Bob
Bob from SWISCO responded:

Thanks for posting. I agree, the 39-188 looks promising; just make sure that the length of the link arm matches up. Let me know if it differs at all.

Connecting a casement window operator to stud bracket
Connecting a casement window operator to stud bracket
VIDEO
WATCH >
Anatomy of a casement window
Anatomy of a casement window
VIDEO
WATCH >
How to identify casement and awning operators
How to identify casement and awning operators
GUIDE
READ >
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 3-4 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 (888) 991-1929 or at help@swisco.com.