Dear friends,
I took another look at Brad's picture of his horn button and noticed there were to tabs holding the spring. I then went back to the little packet of parts that Bruce had sent me and out fell a little cup with two tabs and his instruction to bend the tabs over the spring. The cup and then the spring fit into the disc that Bruce had machined out of white Teflon. I got curious and went back to the box the workshop had belatedly returned to me and out fell a black disc with a cup inside with two tabs. I guess I was cleverer than I thought when I disassembled the car. It just goes to show time and many hands can confuse a situation.
Pictures attached for future reference.
Cheers,
Chris Bryant