Dad's Microfilm

I don't know how long ago this was made, but my Dad found it lying on a sidewalk in Washington DC at about 35-40 years ago. He was always somewhat of a conspiracy fellow, so he kept it. It was in his jewelry box, which I have, and as I was going through it the other day, I realized that I now have the technology to look at it. I have no idea what it is. But it's pretty damn cool looking.