Black and white negative of a protest parade by Shannon workers over the Derry Shootings [Bloody Sunday]

Black and white negative of an Infotronics machine.

Black and white negative spares of an Infotronics machine.

Black and white negative of a march to mass on a day of mourning [for Bloody Sunday].

Black and white negative of a march to mass on a day of mourning [for Bloody Sunday].

Black and white negative spares of a march to mass on a day of mourning [for Bloody Sunday].

Black and white negative of equipment, special for EI Co

Black and white negative spare of equipment, special for EI Co

Black and white negative of the official opening of Molex.

Black and white negative of the official opening of Molex. Negative missing.