casement window operator sash bracket

A home owner from Traverse City, MI says:
Which sash bracket assembly goes with the X-Drive Split Arm ROTO Operator #39-325?
Do I need the 39-534 or the 39-535
A home owner from Traverse City, MI says:
My grand daughter threw the old sash bracket away so I don't know which one I need
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Dave Sr. from SWISCO responded:
If your operator is the same as the 39-325, then I would recommend the 39-534. If you have an identical window in the house then it may be worth checking that to confirm what you need.
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