Heritage mercury mining equipment.

On site at the Almaden Quicksilver county park. A former mercury mine.
I did some checking, this particular piece is from the 1920's.Some of the old castings in the back date into the late 1800's
Mercury was discovered here in 1854.Mining operations ceased in 1976.
See the Almaden Quicksilver keyword link below.

I left the image at full res. so you can see the details.