[Juergen]

You can eliminate the cap/rotor by checking the output of the coil. No spark there (along with no spark at a plug) says it is not a cap/rotor problem.

You have 6.2 volts at the coil. What do you have at the points side. Steady 0 would imply that the points stay closed, while 6.2 volts would imply that the points remain open. Assuming you have an analog meter, a slow crank speed should show some needle movement that the points are opening and closing.