Estate Sale find #1

Before I start this post, I want to introduce myself. I have been a watcher on this site for years and have learned a ton of info. There's lots of smart folks on this site. I've been a hot rod guy for decades, and recently retired from a 30yr career in aerospace. I'm busier now than I ever was, but it's doing stuff that I want to do.

I recently went to an estate sale and bought three minibike frames and was hoping that the experts on this site can tell me what I've got. This is bike #1, other threads to follow. Thanks in advance!! 20211205_132940.jpg