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of Bangor, Caernarvonshire
At some point the business grew with further lines of business in transformers and instruments
At some point seems to have acquired British Electric Meters Ltd
1967 Denis Z. De Ferranti sold the transformer division of the company, Denis Ferranti Meters, to GEC. The company concentrated on meters and instruments. Nigel Z. de Ferranti (b.1940) was managing director.
1968 Lock out of staff at Denis Ferranti Meters, who took industrial action faced with redundancies.
1968 Supplied in-core measuring equipment and transformers for the Winfrith power station 
c. 1970 Mark Ziani de Ferranti, of the third generation of the family, became Chairman and Managing Director of the company.
1993 Company was in existence
2013 James Ziani de Ferranti, the fourth generation, was General Manager.