Derelict Thursday: Hard Hat

Not sure if Derelict Thursday is still running, I hope some one will let me know. This was my Hard Hat for my Hard Head, when I worked underground on The Second Manapouri Tailrace Tunnel project. A 10m Diameter Tunnel 10km long was drilled through some of the hardest rock in the world using a Tunnel Boring Machine. This helmet is very much derelict now as it would not pass inspection and is past it's used by date. 2MTT