replacment part to a skylight

A quick learner from USA says:
Hello, im looking for the a replacement part to a skylight. The mechanism to lift and lower the glass was originally missing the part that you twist or spin to operate it. Ill send pics. Please let me know if i can just replace the smaller part or if the whole thing is necessary. Thank you for your time.
Skylight operator
Profile picture of Tom
Tom from SWISCO responded:
Thank you for your interest in SWISCO. We believe you may have an earlier version of the same type as our 39-379 skylight operator. Please take a look and let us know your thoughts.
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.