Window crank 2560 BF Rick casement

Thanks for posting. I am afraid I can't cross-reference that information to a specific operator in our catalog. Can you show us the entire assembly, from a bird's eye view, with the link arm(s) in view, and we'll try and find something that matches what you need. 

Thanks. Judging by these photos you have either the 39-253RB or the 39-439B, depending on the design of the guide at the end of the arm. These guides work differently and aren't interchangeable, so you need to check your original to determine the best match. The video below will go into more detail.

Regardless of which operator you go with, you'll additionally need the 39-452 cover set (sold separately). This is assuming that your old cover can't be removed and reused, which is the case on most older models.

It's tough to say from these photos, but the end of the arm does appear to match that of the 39-253LB. Based on these pictures that would be my pick, but it might behoove you to remove this to verify before you place your order.