Casement of my window
Hello,
The arm of your operator resembles the 39-430 but the base and mounting plate are a different style, which would most likely prevent you from installing it. Your operator design looks like a cross between a Truth operator body with a Roto arm and clip.
That being said, take a look at the 39-450 Encore Single Arm Operator along with the 39-528 Casement Track and the 39-529 Truth Hardware Track Slider. The opposite-handed version of this operator is the 39-451.
The compatible handle and cover sets are the 39-376 folding set but we also offer the 39-452 nonfolding option. We can't make any guarantees but review the specifications of these parts to see if they could be adapted to work for your application. Thanks for posting.