These were my last bots from 89, 90, 93(G2) before taking a long break till I started collecting again in 97.
I had to redo the image. I knew I forgot someone. Action Masters Treadshot and Catgut from 1990.
The first patent for a Headmaster head was filed 1986-03-31. There are many differences from the production versions: a retracting small head, rotating flaps to cover the arms, and a sliding forehead piece. Invented by Kohjin Ohno. JPS62157596U