Vintage 1980's BROWN Kohler Wellworth Elongated Toilet Standard Height 12 Rough

  
This design of Wellworth spanned from the mid 70's to the mid 80's. Color is Kohler's Swiss Chocolate.

This is a 1985 Kohler Wellworth Toilet with a Elongated Bowl Standard Height 12 Rough 3.5 Gallon Per Flush.