Found it in a house I was cleaning out. Owner was very old and passed away. The relatives took what they wanted and I cleaned out the rest. To some people it is trash. I think it is very cool.
I once posted some artifacts on here and used that exact issue of rollingstone as my background. I love the Dead! I also love artifacts, and that is a mighty fine one you found.
Grooved hammer stone is not trash but I would take that kind of trash any day and the Dead luv em. I use to follow them around as long has they were not way out west. Great find