Casement mechanism

Hi there!

Thanks for reaching out to us. We're happy to help with this. I can't get a good look at your operator from these photos though. Can you open the window and show us the arms that move the window sash?

Thanks for getting back to us. Take a look at the 39-031 Dual-Arm Operator. The dimensions below would be the key factor, paying close attention to the length of the shorter link arm. We also offer the 39-032 opposite-handed version.  For new handles and covers, see the 39-114L and 39-107 sold separately. 

Dimensions for 39-031

Unfortunately, the numbers of your original hardware do not cross-reference to our parts, which is why comparing dimensions is so important. As long as the measurements match, the parts we suggested would be the correct replacements.