[R-390] Meter Question

[Barry]

Gents,

The gentleman selling these sent me one with the front glass broken.  After
receiving it, I realized it may be a "glow-in-the-dark" meter and could be
hazardous.  It was sealed in a plastic bag and I put it in a glass jar with
a tightly-fitting lid until I figure out what I'm going to do with it.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5717004917

I bought it because I wanted to measure the internal resistance in hopes
that it might work as an R390A replacement.  The meter movement is fs=100uA
so it would require some shunting at the very least; however, if the needle
is painted with radium-based paint, then I don't want to fool with it.

Is anyone familiar with these and know if they are hazardous?  It has a
"SEALED DO NOT OPEN" stamp and I thought that might be one clue that it
might be a problem.

Yeah, I know the threat is minimal and as long as I don't lick the insides,
I'll probably be okay, but I just really don't want to take the chance.

Thanks!

Barry - N4BUQ