The green version of this Twin Winton worm apple house was just discovered and is not documented in the American Pottery shaker reference books.  Could there be other hiding color variations?  Maybe yellow?

Below are the typical wood brown color of classic large Twin Winton sets and the unusual red version of the apple.  The sets are large as you'd expect, standing about 4.5'' in height.  They have rubber stoppers and are impressed "Twin Winton".

Twin Winton apples salt and pepper shakers
Twin Winton red apples salt and pepper shakers
Twin Winton apples salt and pepper shakers