Diggerbarns and Allen, I thought the same thing. I think mine came from a spot where I have found Model T parts, so I searched model T distributor parts. Well, I found out model Ts didn't have distributors, they had "timers". So I searched for them and found what I believe is the modern day equivalent of this part, even down to the roller wheel on the arm and the slot going partway down the larger bushing area. The old one was brass, and there was a spring connected to both holes to keep the roller pressed out to the contacts inside the cap. This newer one is made of spring steel to eliminate the need for the spring. Otherwise the same. What do you think?