SB distributor

Okay I have two SB distributors, #1 from the parts yard, has a brass colored shaft at the rotor and tinny springs. This one also has flats for a wrench just under the bigger part of the casting.

#2 has hefty-er springs going in the opposite direction, no flats and plastic collar. The shaft under the rotor is steel (no brass). From jegs back in '07 I think.

Why are the springs and weights going in different directions. Are they both aftermarket?
Pictures would be a plus!