Looking for replacement wright part #07900 window operator

Can we see a photo of your operator? Part numbers can sometimes create problems, since they can change over time. If we see the operator, we can't go wrong.

The photo actually doesn't clarify very much, because the arms are obscured and all I can see is the box. Take a look for yourself.

I think you should consider 39-387 and 39-388, two Wright operators associated with that number (07900). They could match what you need.

Thank you! I actually agree with Ben's guess, the 39-388 and 38-387 look pretty close to your sample.