Many trains running...
Some were straight-6 green, some were straight-6 black with green caps, some were spiral green(especially coin-ops). GE didn't know what it was doing back then. I'll never forget around 1967, going to the late, great Kamenstein's hardware store on Stuyvesant Place in NYC. I opened up a GE like these and saw the green straight-6 activators that had replaced the spirals. Even then I knew GE was going a little mishuggeh.