I found a combo rack/jar. The lid has what's left of the original disc shaped moisture stone (chalk? not sure) Is it worth replacing the stone if I want to store tobacco in it? I've been reading that dryer but not bone dry tobacco tends to perform better than right out of the pouch so I don't know if the moisture stone is necessary or desirable.
The moisture stone works, but those old humidors were designed for the 14oz over the counter blends of the day. You would dump your month's worth of tobacco in there and smoke it. If you Google "Aztec humidor" you can probably find the instructions on exactly how to use that stone. Or use a 68% boveda pack instead. Vintage Baldelli Humidors are probably the best option when it comes to vintage tobacco humidors. Their 'twist to seal' closure worked almost as good as a mason jar.
You could get some felt tape, or use a soft silicone bead to seal the jar. Any pics? Then, just toss a humidifier packet in the jar, and stop all the guessing.
Now that Ryan's alternative suggestion has worked out well (a tall canister), I'll just use it to stow tools, pipe cleaners, etc.
That's what most modern pipe smokers use them for these days. The ubiquitous Mason jar is the default long term pipe tobacco storage option these days. I won't say that one of these has not tempted me a time or two.
