Truth Maxim Awning window operator, sill mount, hard built on cover
Used by most window companies, Including Weather Shield, 

Series: Maxim awning operators
Manufacturer: Truth Hardware
Mounting: Mounts on window sill, mounting plate measures approximately 5" by 2-1/2".
Handed: No, As Shown
Color / Finish: Limited to colors shown 
Dimensions: For arm dimensions see additional images.

Markings: numbers, 41013, 41016 on each arms and 41010A close to the crank.
Sold as Awning Operator only, handle and screws are not included
Material: E-Gard Corrosion Resistant Finish or Stainless Steel for coastal areas 

Related Parts: 
Folding Handle, Track and Pivot Slides Optional Accessories