This is a patch for the first Argosy mission - Werner von Braun's proposed program to leverage and expand the Apollo technology to send manned missions to Mars starting in the early 1980's. Sadly, due to the politics of the time, it never got much further than the drawing board.
The Argosy missions would have used twin craft on each mission as a safety redundancy. I reasoned that each missions craft would be named after mythical twins - in this case Amphion and Zethus, the twins sons of Zeus and Antiope. The twelve stars represent the twelve man crew. The overall design is a shameless nod to Bob McCall's memorable Apollo 17 mission patch.
I produced this for my buddy Drell-7 who's been modeling and imaging this mission is a series of works in his DA gallery [link]
. If you'd like to get full details on the proposed program, check out this great summary from the FALSE STEPS aerospace blog: [link]