I found this in the garden yesterday (pictures on link below). It's
made of lead and looks like a large rivet. The dome is 2" in diameter
and 1" deep, the length is 4.75" and the shaft is 0.75". At the end is
a small steel pin, it is loose but will not pull out. There's
something loose inside as it rattles when shaken.
Anyone got any ideas? I was a bit reluctant to pull the pin too hard
or cut it open!

http://www.dalecu.co.uk/images/Dscf0071.jpg


Dave