Hi all, I bought this a while ago, the seller couldn't say anything about it. Other than the fact that it looks to be old, I don't know anything about it.
It's 32 mm across, weighs 12.5 g and shows no signs of having been enameled or similar*, the needle looks original (to me) and moves.
I'd be grateful for any
helpAndreas
* looking at these large pictures, I'm not so sure anymore. The
red seemed like it was just earth.