Something interested appeared. These are Soviet era radiation dosimeters. They are particularly interesting being they are electro-mechanical and resettable. They have a small quartz fiber inside that gets charged up and the exposure to radiation reduces that charge and moves the fiber. They could potentially work over a very long period of time.

The little included stand has a small movable coil that can ‘recharge’ the fiber and can set the start point.

Neat in that after the first person holding it dies from radiation exposure the next person can re use it!

The scale is – 0 – 500 rad. That is a pretty aggressive exposure scale for a dosimeter.