The window in question is probably about 20 years old. As I bought the house 3 years ago, I have no idea of actual date or the manufacturer. In observing the operator it cranks normally to the stop. Is it the weather stripping becoming old and stiff or a worn operator,the manufacture of this is Truth. Can you help to solve my problem and supply needed parts? If you need anything or different or better pictures just advise.
Thank you
Alan