Need new window operator

A handy person from Sarasota says:
July 19, 2018
I tried one by guessing 39-278 but was just wrong - almost but wrong screwholes/locations.

Can you help me identify the correct replacement part?

Thanks.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
July 25, 2018

Hi there, I'm not quite sure what you'll need yet. You'll need to remove the operator completely so we can take a look at the linkage. It helps to see what type of arms you have and how the link arm attaches to the side of the window. Seeing the mounting hole locations will help, too. You can begin looking over our 39-056 and 39-084 and the video below in the meantime.  
Crossly Window Crank
Crossly Window Crank
39-056
$21.41
Crown Window Crank, RH
Crown Window Crank, RH
39-084
$20.45
How to Replace an Awning Window Operator [1080p]
How to Replace an Awning Window Operator [1080p]
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.