Interesting.
That may well have been operated by my Father at some point. He used to repaint the playfields in that diamond arrangement. He had a stencil that did this effect. Many of his cabinets were repainted, or stainless steel was used to cover artwork when these were recognized as gambling games. The siderails were factory wood and replaced with metal. These also used to have wooden legs. The channels around the head was for perspex, so when the player lost they could not throw their stubbie through the backglass. My father had perspex reproductions made to replace all the Bally bingo's backglasses.
It is a fun game.
