We have nine reminders of factory scenes, sports day reminders, fundraising and the day an important visitor did a tour.
Perhaps you are pictured or you can spot someone you know. We would love to hear from anyone with memories of working at the factory.
Take a look through our photo collection and then get in touch to tell us more.
1. Smiling in the rain
Plessey workers were pictured leaving their meeting at the Unionist Club, South Shields, in 1969. Photo: Shields Gazette
2. An aerial view
Surrounded by housing and the busy Frederick Street shopping area, the large Plessey Telecomunications factory and the smaller Mary Harris clothing factory are pictured in the new industrial complex at South Shields in 1971. Photo: Shields Gazette
3. The day the Mayor paid a visit
The Mayor and Mayoress of South Shields, Ald and Mrs A M Southwick, during their visit to the Plessey factory at Laygate. They are pictured with D G Booth,right, regional general divisional manager, and P Bourke, a solderer at work in 1969. Photo: Shields Gazette
4. A new addition in 1969
The Plessey 5005 Crossbar telephone exchange equipment was pictured being assembled at the Company's new £500,000 factory at South Shields in 1969. Photo: Shields Gazette