Green Backs (GB) started in 2014 and finished in 2015, with a total supply of 21 million coins. The team/founder is hidden, The main reason this coin was listed is desertion.

(from old site) GreenBacks (GB) is a currency focused on building new technologies, creating a successful infrastructure, and continually improving/adapting as crypto currencies move forward. The key point that will make GreenBacks the top crypto currency next to Bitcoin is the infrastructure we are talking about building.