[R-390] meter luminescence

[Charles Steinmetz]

Brian wrote:

>Seen plenty of blah brown meters that do nothing but move the pointer, in
>'390's and '390A's, in my day.  Never before seen ones where the markings
>glow a "Luna Moth green" after exposure to light, like the hands on a Big
>Ben clock of some years back.  Were there actually meters that had the
>strontium aluminum silicate [I'm guessing at the composition here] rather
>than the radium?

Not R390/390A meters, that I'm aware of.  They were all 
radioluminescent, not photoluminescent.

Best regards,

Charles