A Cold War Artifact

I have discovered – whilst doing a ‘clear out’ – a Cold War artifact.
It is a pen-type radiation dosimeter. Calibrated from 0 – 200 roentgens. 11.5 cm long, 16 mm at the ‘eye’ end, 14 mm at the distant end, black body, yellow pen clip at the ‘eye’ end, absolutley no makers or AM marks anywhere.
No idea whether I aquired it via the RAF, or via UKWMO.
If anybody wants it for display, etc, then give me a shout.
Else it goes in the bin!
HTH
Resmoroh