Truth Entrygard Dual Arm Wood Window Awning Roto Crank Operator - 20-5/8 inch - (Truth Entrygard 11.43) 

Used by Weather-shield, Caradco, Shelter, Seal-Rite and other wood window companies.

Used with 22-3/4 inch guide bar (not included).
Sill mounted awning operator hardware for Truth 11.46 / 11.43.  
Uses a guide bar/track attached to window sash and cranks open. 

Truth Base # 45301 and housing # 45002. 
US Patent # 450560 and US Patent # 3457675 on arm.

Cover, handle, shoe studs and guide bar are not included. Operator mechanism only.

Note: 3 of these will look the same, please compare measurements.

Related Truth Window Parts:
55300 - Cover, Plastic  Truth # 10341
55311 - Handle Only, Standard  Truth # 10579
555020 - Guide Bar / Track Only  Truth # 31641
555021 - Awning Operator Only with Built in Cover
55222 - Entrygard Awning Operator Removable cover
555024 - Shoes Only - Pair, Truth # 10005

Priced and sold each.