The Andersen® 100 Series arch single-hung window was introduced in 2008.
This is your window if...
The interior hardware is white and "Andersen" is printed on the lock cover.
The operating window sash automatically locks when the window is closed.
The upper sash is arched and fixed (does not operate).
The lower sash can be raised for venting and does not tilt in for cleaning.
The window lock hardware resembles the lock shown below.
Product Detail Information 
The exterior color is one of the following:
White, Sandtone, Cocoa Bean, Terratone, Dark Bronze, Black.
The interior color is one of the following:
White, Sandtone.
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