[sdiy] OT - PCB oil danger?

[Toby Paddock]

It's kind of maybe sort of nearly on-topic because I plan to 
use it as a modulation source. :) 
And you folks are the folks I know that I think 
are the most likely folks to know about this stuff.

I bought an old accelerometer that uses some kind of oil 
for (I assume) damping. It is a potentiometer with a weighted 
wiper mounted on leaf springs (I think). It's easy to 
open, but hard to see the guts. So I'm wondering about the oil. 
So I'm wondering about PCBs. Was PCB stuff used mostly for 
high voltage applications? Is this thing likely to have it? It has 
a sticker that says it was *OK* in 1962, so it is older than that.

So I'm wondering...

Should I stop opening it and just use it or
should I seal it in a plastic box and just use it or
should I evacuate my neighborhood and call the space-suit squad?

If the photo is still there, this is it:
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1618793124

Thanks,
 - -- -  Toby Paddock