Title says it all. I know the left side piece has a Mitchell arm piece at the front -- the same as the cone knee-dart. I know the inside piece is the handle part of the Paterson stirrer. I have no idea what the housing is, except that it was originally yellow, and designed to interlock with others like it, from the "rails" on the top and bottom.
I know the rigth side piece is a bit of sheet plastic with labels and such, but the round bit at the end looks like it might be another Mitchell piece, and the three things sticking out at the mid-point seem to be electical components of some kind.
Andy, I hope you don't mind me using your pictures to show what I'm talking about. And anyone, your insights are greatly appreciated...