Replacement for Silverline Casement Window operator, marked Roto OP05-7524-03
A professional from Ann Arbor, MI says:
June 22, 2018
Replacement for Silverline Casement Window operator, marked Roto OP05-7524-03, made 2003 Arm is just over 9" long Crank handle has allen wrench-type spindle, although I would take it either way
Tom from SWISCO responded:
June 27, 2018
This looks a lot like our 39-399, but your arm is a lot shorter than ours. Please bear with us a little longer as we try to find a smaller version of this operator. Thanks again for waiting! Please see our 39-429, I believe this can work for you.