Andersen casement. It has number 33178 stamped on it.

Hello,

Thanks for reaching out! You'll need the 39-031 and 39-032 EntryGard Dual Arm Operators to replace your operators. I'm confident these are the correct matches but take a look over the specifications and compare them to confirm is this is the correct match.

The compatible hardware and accessories can be found in the related products.

Dimensions for 39-032