Water Meters, page 2
Here is what the bottom of this meter looks like. The one on the right is missing the plug
Another other common type of meter uses has a cast iron bottom that breaks into 4 pieces and falls off when the meter freezes.
Here you can see the two different styles of Firefly meter readers. On the left the reader is glued to the glass surface, and on the right it is a ring that fits around the glass.
