classic motorcycle forum

Hi every body I'm George living in South Africa.I got hold of what I think is a old model Moto Guzzi bike.It needs some attention and as I heard it stood for almost 20 years. There are no indication on the bike it self regarding model or engin capasity but I took some pics.I would appreciate any help from the members to identify the bike.I also had a look on the site and think it might be a 1979 Lemans Mrk.1.