Dale -- I saw a couple (very expensive Swiss watches) about 1960. As I recall, we counted them and estimated something like microcurie amounts. Ron On Tue, 25 Apr 1995, Dale E. Boyce wrote: > I have been told that Sr-90 was used briefly in flourescent watch > dials. I have never seen one, however. > > Dale > dale@radpro.uchicago.edu >