Looking at the lead from the coil it appears to be dodgy as it comes from the coil. Is it soldered there? If it is and it is a wire core rather than a carbon core you could unsolder it and replace it as it may be faulty. Where does the HT lead leave the plate? Is that a hole for it down beside the tip of the field pole? You could also try disconnecting the condensor lead to test for spark or if you have an ohm meter, the old dial type, digital ones don't work as well, you can put it on the highest ohm scale and place the leads across the condensor with the points open. If it is good the needle should flick up and then drop back. If it no good you will either get no flick or it will go up and stay up.
