Stephen charger device for dosimeter type personal radiation measure.
Stephen recharging device for dosimeters, genuine cold war era British surplus.
Quartz fibre ( pen like ) dosimeters require recharging once the exposure is gained and the device has lost its electric charge.
The recharging is fairly easy just put a battery in the charger, remove the ca from dosimeter, turn the charger to 0 set press the dosimeter on pin and turn the charger wheel, once the dosimeter is charged, touch the pole of the dosimeter with pencil and put the cap on. Enjoy some radiation and repeat. ( not recommended )
The Stephen device is very robust and there is no guarantee if some of the components are dried out, but most likely these are fully functional, as they were manufacture to survive the nuclear apocalypse. Most of these are in original box, and stamps may vary.
No guarantee, may require some maintenance.