I need to replace the window operator (crank) for a casement type Marvin window. I have two casement-type Marvin windows that I believe were installed about 1990. They are about 56" tall and 27" wide, including the frame. Facing the windows, the one on the right is still in good working order, but the crank on the window on the left broke and I no longer have the crank so I can't provide any numbers that may have been on it. The crank on the left was exactly the same as the crank on the right casement window except that it was for a left-handed window so I've attached photos of the crank on the right window hoping that you can identify what kind of crank I need for the left window and that I can order it from you. The crank on the right window says "Truth Entry Gard" on the long piece (see photo) of the crank and has the number 20810 on the shorter piece (see photo) of the crank.
I hope you will be able to help me get a suitable crank for the left window