Saturday I was at a small town fair with my wife. While there I spotted an interesting scope. A Penncrest 60mm f1000mm #2593 in a nice wooden box with most of the bits & bobs still with it. I was able to identify everything in the case except this. After a search I found other scopes that come with this, but I don't see it identified. I can guess what it is. However I hope the combined experience of this group can tell me for certain what it is.