Correspondence regarding a Johnson & Phillips hot wire voltmeter

Made:
1906-09-25-1914-10-20
maker:
Johnson & Phillips Ltd and British Engine Insurance Ltd

File of correspondence between Johnson & Phillips Ltd and The British Engine, Boiler and Electrical Insurance Co. Ltd. regarding the supply of a hot wire voltmeter.

Details

Identifier:
YA1966.25
Access:
Open access.
copyright:
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