Or someone who is knowledgable about mining in that era. I found these two little items near a mining town. They are iron, not brass as would be expected around explosives.
The only other option I could think of is - back years ago, the coal miners got their lunches right on site (at some camps), and it could be a pot hanger.
I live in a state of rules where I am not permitted to live on my own country land because my home is not 130 MPH rated! I can only visit it from time to time and pay the fines. I feel so safe with Big Government protecting me. In some states its illegal to collect rainwater.