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- Federal Products Corporation Model E81 Dial Indicator, circa 1950 - Dial indicators provide accurate measurements of parts used in a number of manufacturing processes. The large numbers on the indicator's face make small, imperceptible dimensions visible. Operators compare these measurements against a standard and make corrections if any deviation is found. The Federal Products Corporation made a variety of precise measuring devices in the 20th century.

- circa 1950
- Collections - Artifact
Federal Products Corporation Model E81 Dial Indicator, circa 1950
Dial indicators provide accurate measurements of parts used in a number of manufacturing processes. The large numbers on the indicator's face make small, imperceptible dimensions visible. Operators compare these measurements against a standard and make corrections if any deviation is found. The Federal Products Corporation made a variety of precise measuring devices in the 20th century.