I'm don't know if this is a round or rectangular set but I'm sure someone on here would know.

http://stlouis.craigslist.org/ele/785653710.html

I believe its a rectangular set. Early solid state?

A couple web sites indicate this is an in-line gun slotted mask set, so it would be a later model, definitely solid state.

http://www.usedprice.com/dropdown.php?catname=video_tv&mfrid=670&typeid=375&pl=1700

indicates 19-inch set