Pre 1980 Bilt-Best Imperial Style Casement Operator Replacements

Please review all information as outlined below .. these are replacements for the "original old BiltBest" , Imperial Line of Original Casement Operator / Crank Assembly Parts. This is a complete Imperial Operator Package Replacement for the original OEM Style Imperial BiltBest Casement Units - Package Consists of (1) Sill Stop Cover, (1) New Style Single Arm Operator,  (1) Crank Handle and (1) Casement Sash Track Assembly - This is what you will need to swap out the old casement operators. This is what is commonly referred to as your most accurate-sash assembly of parts for your old Biltbest Casement units. Replacement Upgrade Package and "Sill Stop Kit" - all sizes allowed -  Glass Widths - 14 5/8", 19 1/8" or  22' | Sill Lengths 16 1/8" , 20 5/8" or 24 7/16" - Custom Sizes Also Available. Will Not Work On Old Imperial Awning Units