NCS Portable Substandard Millivoltmeter Dual range moving coil instrument 0-100/1000 milliVolts DC complete with leads. A substandard meter is in no way inferior to most other meters but one having a more than usual accuracy against which other meters may be calibrated. Working, Nalder Brothers and Thompson Ltd.Dalston Lane, Hackney, London E8, UK, date unknown.
This is one of many instruments collected by Jack Davidson C Eng FIEE which I have been given by Dr Graham Winbolt
Details of calibration etc on underside of the box lid.
The meter slides in to this box for transport.
The firm was started in 1884 by Francis Henry Nalder [1859-1972] in partnership with his brother to manufacture electrical instruments in Brentford Middlesex. In 1899 the business was registered under the name Nalder Brothers and Thompson Ltd, Mr E Thompson being one of the directors. IN 1914 the factory moved to larger premises in Dalston where it continued to operate until 1969.