I've tried finding the caliber in the pink pages, but can't seem to find it. It says Alstater on the bridge. Other than that, the seller states it as running and working, and I didn't pay a whole lot of money for it. I've been looking both for a Gotham and a vintage chrono for a while, so this fit the bill nicely. The dial says "Gotham Gothameter" (what's Gothameter) I think it is probably from before 1950 because of the looks and the lack of shock protection..?
Any comments would be welcomed. Thanks.