Megger model BMV7 battery operated insulation tester by Evershed and Vignoles Ltd.

1970-1979

Megger Series 1 Insulation Tester

1970-1979

Megger' insulation tester, 1959, dismantled

1959

Megger Major insulation tester

1960-1969

Prototype battery Megger tester

1964

Megger mains-operated insulation tester

1950-1969

Megger Major hand cranked insulation tester

1980-1989