Pan American window operator
Hi there!
I'm afraid we don't have an exact match for this operator but you can start by taking a look at our 39-419 and 39-420 awning operators. The installation holes on the bottom tab look like they differ from yours but look over the specifications and compare them with yours to see what you think.
It's hard to make out accurate dimensions from photos but the 39-419 and 39-420 operators that Emily mentioned would be our closest match. My concern is the bottom hole locations not being in a "straight" line. You might need to re-drill or possibly make the holes larger in the bottom leg of the operator to match the holes in your window frame.