Any ideas what this is from?

I think its from an old tape drive but not sure. It looks like a CPU (loaded with gold pins) with heatsink attached but I don't think that's what it is. I just hooked up with an estate that has hundreds of old mainframes and tape drives from the 70's and 80's. I'll be cleaning it out over the next few months and will be selling much of it as scrap. I'll post pics of some of the cool stuff. I've never seen most of this equipment/boards before. Some of it is from the 60's.