marvin casement window

Home Owner from new jersey
Hi all! I need to replace this part in my marvin window. I can see "U truth" marked on it but no numbers. It was installed about 1984. Can someone tell me what part to order?

thanks!

Karen
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2 Replies
Bob
Bob from SWISCO
SWISCO
Expert

You might have a dual-arm operator like our 39-031. Please compare the dimensions of the entire assembly, including the link arms, to the image below. Let me know if anything differs, and if so, explain how. 

Dimensions for 39-031
Dimensions for 39-031
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