I am not sure I have ever seen this topic posted here.
I have a '65 Gottlieb wedgehead that is in pretty nice shape. Some former owner had snipped off the wires to the coin-drop switches, at a point near the wiring bundle, wrapped the wire-ends in electrical tape, and removed the switches. The game is so nice that I thought I would make it whole again. I had the switch parts and figured I would splice replacement wires from the coin-drop switches back to the wiring bundle.
However, when I unwrapped the electrical tape, I noticed the stranded wires coming out of the wiring bundle were silver in color. Was Gottlieb using aluminum wire during the mid 60s? I had not considered this.
I am assuming that since the coin door operates on line voltage, I don't want to splice copper wires to the existing loose wires, as warned about in electrical wiring code? Does that make sense?