had a visit to this old gravel quarry with a friend of mine..located on the norfolk/suffolk border,not a massive amount to see,it's been shut a lot of years,but the main attraction was the nice crane parked outside.
Interesting machine. There are a couple similar to this parked up at Cocking limeworks.
All wire rope and clutches. Here is a short vid about similar machines to this. (sorry about the accent)
[ame]https://www.youtube.com/watch?v=f6-R_AGAAe4[/ame]