On this casement window the "C" shaped pin that holds the arm into the actual window, I believe due to the tension/weight/pressure of opening and closing, opens up ... the pin comes out and snaps off preventing the window from being reeled in to close because the arm is now detached from the actual window. The only marking found on any window is attached to the arm as depicted in the attached pix. Thank you!
Casey from SWISCO responded:
May 27, 2014
Thank you for your patience in this matter! We are currently working on a replacement for this hardware and will let you know as soon as they are online and available to view.
Tom from SWISCO responded:
June 3, 2014
Alright, our new 39-553 and 39-554 are now available for purchase!