Antique car top. Was informed by someone much more knowledgable that it's commonly referred to as a California top.  We found it on the second floor of our carriage house we recently restored. Guessing it's about 100 years old. Includes 4 doors with glass and two side windows, and the backing for the rear, all shown in the pictures. I think this could certainly be restored and used again, all things considered, it's in pretty good shape. There is an interior dome light if that helps, not sure ho