I’m not familiar with Nova model numbers so I’m not really sure what you have. The Nova brand name has been applied to a line of custom guitars built by John Buscarino as well as a line of cheap Chinese imports.

Have you seen the Harmony Central Reviews?
http://reviews.harmony-central.com/reviews/Guitar/brand/Nova

According to Jedistar, cheapie Novas were sold through the Sears catalog.
http://www.jedistar.com/jedistar_vintage_guitar_dating_n.htm