Ignition box retard with RPM

Some photos of original inside and some uh recent versions in this thread.
Inside a FBO control box

Inside a dead parts store version. Airtex 6H0162
Stop on in for a cup of coffee

Nacho posted here that the original TO-3 on a MP Chromed box was Motorola MJ10012


Although slightly off-topic, this guy posted a summary of the Revenator patent and the patent number. It's of interest because it works very differently.
Just got the revenator, have a question