Not a phone number; Central won't know what you're talking about if you ask for it.
Weston was a huge name in meters for the better part of a hundred years. Their VU meters were among the very best (and very first) made.
The fan shape of this meter is typical of early 20th-century meters, a streamlined change from the heavy cylindrical castings found on older meters. It mounts to a panel using the terminal studs, typical of most such "surface-mount" meters -- and insulating bushings, if the panel is metal. This one is missing a bushing at the (metal) case on one post; I can probably come up with something.
A nice application for a meter like this would be in a 1930's economy-type ham transmitter, where one meter does the work of several with meter jacks in the plate and grid connections and a long cable and plug connected to the meter. Just add suitable shunts at the meter jacks and voila! No fussing around wiring the grid-current jacks backwards, either.