Casement window operators

A quick learner from USA says:
First three pictures from a Peachtree Window installed around 2007 Truth part number31850. Last picture from Preechtree installed around the late 80's early 90' Only number on it is 21 Looking for replacement parts. For the 31850 locks on the left, the other locks on right side looking from the inside.

Thank you
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting! Your first operator is very similar to our 39-315. I would just compare our dimensions to yours to confirm. I'm afraid the other operator is discontinued and not made anymore. At this time, we know of no modern substitutes.
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