Keystone WW Water Meter

This is a disc water meter with split case and no serial number that fit a ⅝” pipe. The Pittsburgh Meter Company introduced the Keystone meter in 1901, and the Pittsburgh Equitable Meter Company was still producing it in the late 1930s.
date made
ca 1901-ca 1940
place made
United States: Pennsylvania, Pittsburgh
Physical Description
bronze (overall material)
overall: 7 1/8 in x 7 1/2 in; 18.1356 cm x 19.05 cm
ID Number
accession number
catalog number
Credit Line
A.A. Hirsch
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Water Meters
Natural Resources
Data Source
National Museum of American History


Hi I have found a water meter cap marked: Pittsburgh meter co, keystone serial number - 1258011 and on the back patented July 2 1901 - March 8 1910. It was found in Western Australia or possibly Tasmania. (Was a few years ago my memory is a little vague) do you have any info how it may have ended up there from Pittsburgh?

Add a comment about this object