Hi Smudge,
I'm really not qualified to provide an authoratative answer, for that you need a medical radiation specialist. Harwell training was intended to scare the crap out of us if we were intending to handle anything that was likely to register on a particle counter. TBH, I remember more about beta backscatter experiments....but the American radiation accident films shown certainly taught us respect for extreme radiation hazards.
My post was intended to give some reasons why old luminous dials might need to be treated with more caution than one might have experienced in former times. I would guess that the risk is not a large one, but as it is a non-zero risk it needs to be treated as such. We were told, for intance, that tolerance for a given radiation dose could vary significantly across the population and that its effect would also depend on the type of cellular genetic damage done.
To put this all in context, remember when sunbathing was considered a safe and desireable activity?
Ripline