Replacement casement pivot arm operator part needed

A home owner says:
Looking to replace rusted, broken bathroom window casement pivot arm operator. Picture shows:

"Truth" on arm (see picture)
What appears to be "W&M" on crank handle
Thumbnail of the uploaded file named IMG-1032.jpg
Profile picture of Casey
Casey from SWISCO responded:

Hello,

Take a look at our 39-239B operator, as well as the 39-536 pivot slide and other related hardware. Thanks for posting!

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