NEED WINDOW CRANKS FRO BONVILLECASEMENT WINDOW PATTENT # 5410778 TWIN ARMS 3 OF OPEN LEFT 2 OF OPEN RIGHT GOLDISH TAN IN COLOR ALSO NEED 2 FOLDIND HANDLES
Bob from SWISCO responded:
January 6, 2021
This looks like either the 39-253LB and 39-253RB, or the 39-438B and 39-439B. The difference between these two types of operators is explained in the video below.