Arm operator for old casement windows

Thanks for writing in! The closest replacement match we have for this operator is the 39-020 Wood Window Crank. Carefully compare the dimensions to see if this is a match. 

The compatible track is the 39-520 13-1/2" Operator Track. Be sure to double check the measurement for yours.

Dimensions for 39-020

Alternate image for 39-520

Diagran of the 39-520 operator track

Yes, that would be the 39-021 tagged below. It can also be found in the related products.

Please let me know if there is anything else I might be able to assist with.