I remember that particular design being used in the 70's and 80's
If it is indeed one of the old uniform buttons minus the shank, then I'd say pre 70's.
Now that I think of it... that you most likely have is a class/grade pin and the pin is sheared off. We lost those all the time. The ones we were issued in the 80's were filled with enamel of the color representing your grade.... the triangle shield and sword would show through as polished brass. Some were anodized instead of enamel filled if the grade was gold color or bronze... or black. Yours most likely is a Voyager, Explorer or Guide class pin. It would match perfectly to the size in your pic.
We were always told if we lost them they were gone forever..... we would get a stern talking to and then one would show up 4-6 weeks later.
If you find any plastic tubes out there about 1.5 inches long by 3/4ths of an inch...they were the old scarf tubes. They use cloth ones now made of patches.
I did some looking and theres a website with Pathfinder history and the changes in uniform pins and patches.
http://gc.bigfoottech.com/Ministries/Pathfinders/tabid/54/Default.aspx
I'd like to see your Adventist tie tack... I might be able to date that. It might also be Pathfinder gear.
This park may have been used for something called Camporee, a yearly gathering of Pathfinders from all over each state. Otherwise it may have been a Camp Meeting ground where SDA's congregate for a week in the summer. Could this old park have once been an Adventist summer camp? this is usually where both these events occur.
