Anderson casement window split arm operator

A home owner from Portland, Maine says:
I need to replace the spit arm operator in my Anderson casement window: it is has 0-9400A-1 stamped on the front, and F-9400-8A stamped on the underside. The window opens from right to left. Thanks in advance.
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Dave Sr. from SWISCO responded:
Those numbers correspond to a few different parts. Could you show me a picture of yours out of the window? That will help us find the best match.
A home owner from maine says:
Here it is: thanks for any help you can provide.
User submitted a photo of a window operator.
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Tom from SWISCO responded:
Thanks for posting, I recommend taking a look at the 39-264. Also if your windows were made before 1999 then you will also need the 39-362 adapter plate.
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