The three-link chain is the main symbol of the Independent Order of Odd Fellows and its presence on a cemetery tombstone, gravemarker or monument indicates that the deceased belonged to this fraternal organization. The three links represent friendship, love and truth.
Here is a link with information on your metal headstones. Interesting fact too, I did find in my research that during prohobition, they were used to hide moonshine.
Yo I don’t know if you will see this but you published a video on January 9th 2022 exploring the Archbald old buildings. I was wondering do you know when that was first built or abandoned I’ve been up there with my buddies and I’m just wondering?