Replacement Window Operator

A quick learner from Decatur, IL says:
Need help in identifying parts needed to replace my window operator. From the inside this would be the left window. Outside would be the right window. (FRom inside window cranks open to the left) I need to replace the entire assembly. The main arm has "Entry Guard Truth" stamped on it and appears to be about 8 or 9 inches long.

Thanks!
Thumbnail of the uploaded file named P4190786.JPG
Thumbnail of the uploaded file named P4190787.JPG
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Bob from SWISCO responded:

Hello there. Take a look at our 39-031 and 39-032, or our 39-155 and 39-156. Slight differences in the length of the link arm are what distinguish these two sets of operators, so compare both with your old hardware to see what matches best. 

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