Old Marvin Series Casemaster / Awning Window Crank Handle and Cover - it has the ROUNDED [Curved] OLD STYLE, 10898270 Satin Taupe, Bronze 10898240, and WHITE  10898250.

ABOVE UNITS HAVE BEEN DISCONTINUED - NO LONGER AVAILABLE 

NEW STYLE FOLDING HANDLE REPLACEMENT CAN BE FOUND AT THIS LINK BELOW:

Bronze Finish  - Folding Handle and Cover Upgrade [Nesting Handle and Cover As Shown]  The Entry Gard Bronze or White Finish is available. Please specify color selection in comment section at checkout - IF NO COLOR IS SPECIFIED WE WILL SHIP BRONZE.

BiltBest Window Parts Casement Operator Slide Track

Casement Operator Track - Replacement track for BiltBest Windows - track where sasement operator arm connects and slides as unit open

A Roto Gear Dyad window operator is a specialized crank mechanism used on casement windows, designed to open and close the sash smoothly using a compact, two‑arm (“dyad”) linkage system. The key point: a dyad operator is built for narrower casement windows where a full dual‑arm operator won’t fit, but it still provides strong leverage and up to a 90° opening.