Anderson silverline

Thanks for posting. I am confident we can help, but that stamp is not an identifier. Can you show us the entire operator, including the arm(s) that move the window? That will help narrow things down. 

Thanks for getting back to me. This actually looks like the 39-329 ROTO Operator to me, but compare the dimensions to confirm. For a compatible handle, see the 39-232 sold separately. Let me know if you have further questions.

Alternate image for 39-329