Marvin Dual Arm Roto-gear Operator, Complete

Replaces discontinued case master part with no issues

Replace operator on my 1986 Marvin Casemaster window without issue. Do be warned that installing the replacement is non-trivial as you have to (carefully) pry up existing bottom frame member which may damage paint.

Perfect fit.

The operator was easy to install, and It fit perfectly.

Perfect fit

Good value, renew older windows.