✅ SOLVED Found seated half dolar and these...

[wheres_wheatie]

I think this could be some type of pin?



I found these in two different holes around 10ft apart...

 

[trdking]

Bottom pic looks like alignment pins No Idea on the top Its pretty toasted

 

[Subterranean]

The top piece is a lapel pin, with the remnants of of the attachments on the back. It appears to have four cylinders or pistons across the top, with four interlocking hands/arms in the middle. Something like the Local Brotherhood of Machinists or the like. Those alignment pins are interesting...Sub