Vacuum-tube voltmeter model 400D serial no.E204 00

Made:
1960-1984 in Bedford
maker:
Hewlett Packard Company

Vacuum-tube voltmeter model 400D serial no.E204 00101 by Hewlett Packard, Bedford, England

Details

Category:
Electricity and Magnetism
Object Number:
1990-213
type:
voltmeter
credit:
Royal National Throat, Nose and Ear Hosp