hardness gauge
Maker
West Allen & Co Ltd
Description
Electronic detector to check for spikes in the mains electric supply. In the early days of computer controlled processes such spike could affect production. Grey tin box with rounded corners and carrying handle. Black face.
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Object detail
printing:label:instructions on the back.
Dimensions:0 - Whole:W 17.4cm (W 6 7/8")
Dimensions:0 - Whole:H 17cm (H 6 11/16")
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