Anderson 2420 right hand casement crank

You have a very old operator that hasn't been made in years. We unfortunately don't have an exact replacement for it, or even a confirmed substitute, but I've had some past customers tell me that they got our 39-020 and 39-021 to work. 

If you go this route, you'd also probably need a new 39-520 track to put on the sash. Furthermore, the different style base may require that you alter the wood sill trim to accommodate the shape. Even after all that, I cannot guarantee that this will work. Your parts are just too old to make a guarantee.

I'm sorry that we can't give a more confident suggestion.