Crank handle

A home owner from Chicago says:
I am looking for 2 crank handles that will open my 1913 casement windows. The hardware is manufactured by John S. Gullborg Co.

User submitted a photo of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Please look at our 39-268 operator. I think this could be the one you are looking for. I have used it myself for old windows similar to this.
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