It is a 60 size biplane, and is basically a knockoff of the old Andrews Aeromaster.
I lived in Mass in the 70s and these (and the Aeromaster) for very popular.
The construction of this is just like the aeromaster, and it looks almost
identical to an Aeromaster built with the 2 smaller straight wings.
It was a a great flyer.
This is an all balsa kit for people who like to build.