I don't really know much about it, beyond the basic idea that it's a role-playing game about agriculture and development. It was developed as a teaching tool in the 1970s by Graham Chapman from Cambridge. You can read a piece by him in Area from 1973 about how the game was developed, how it works, and its purpose here.
You can read a brief piece from the New York Times in 1982 about how the game was being used at the World Bank here.
Email me at firstname.lastname@example.org if want it. I'm not charging for the object, but will need you to pay for postage (which might not be cheap, given its size and weight). First in, best dressed...