Night Owl Cards

Before my interest in baseball buttons disappears completely -- as most of my non-card interests eventually do -- I thought I'd dig up this beauty. Does anyone remember these? I'm really hoping someone does because my memories of how I acquired this are almost non-existent. And there are no markings on it to help me dig up any information. I remember these buttons featured stars of the time period -- late 1970s, I'm guessing -- because I think my brothers each had a button of player on their favorite team, too, and I think my youngest brother had a button of Eddie Murray. I know the number on the right, the 159, is the "button number," like a card number. I know nothing else. What I do know is these things are huge. They're just shy of the size of a hockey puck. It seems ridiculous that anyone would wear these in public. But because I was a kid and because it was the '70s, I did wear this in public. I was a little kid, and this was a big butto...