Casement window hinge

This window operator appears to be a match for the 39-221B Encore Dyad Sill Mount Operator. Ours is not sold with a cover and handle, so you'll need either the 39-375 (folding) or the 39-451 cover and handle kits, if yours cannot be removed.

The other compatible hardware and accessories can be found tagged below, along with the opposite versions of the handle kits and operator.

detail of 39-221B