[Mr 42]

Measure the voltage on the Negative side with the ignition on, should be around 6V.
Then measure the voltage with the point open , on the point that is connected to the plus side of the coil.
If you have around 6V.
Then try this.

Take an ignition cable with a spark plug, put in the coil and ground the spark plug.
Set the distributor so the points are open.
Turn on the ignition.
Short the point with a small screwdriver for a second or two, and when you release screwdriver you should get a spark.

If you get a weak yellow spark, the condenser is the usual suspect.
Even new ones can be bad, or old NOS ones.

If you dont get a spark at all i would take a look at the coil.