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605 = original design
605 = intermediate design, trying to lighten it up.
606 = latest design: 750 lbs lighter to orbit, partially by jettisoning of service modules walls.
Much larger escape tower, protective launch cover, circular solar arrays, encapsulated service mosule works etc.
Folding launch seats, latest avionics, LCD's, a head & much larger than Apollo - crew of 6
605 = intermediate design, trying to lighten it up.
606 = latest design: 750 lbs lighter to orbit, partially by jettisoning of service modules walls.
Much larger escape tower, protective launch cover, circular solar arrays, encapsulated service mosule works etc.
Folding launch seats, latest avionics, LCD's, a head & much larger than Apollo - crew of 6