Black and white negative of the board on a visit to De Beers.

Black and white negative of the board on a visit to De Beers.

Black and white negative of two men on the new De Beers squash court during the opening.

Black and white negative of a group with a cup at the opening of new De Beers squash court.

Black and white negative of people at the opening of new De Beers squash court.

Black and white negative of a group with a cup at the opening of new De Beers squash court.

Black and white negative of an EI Co. stall at Expo 75.

Black and white negative of an industry stall at Expo 75. Negative missing.

Black and white negative of a group at Expo 75.

Black and white negative of an Lep (Shannon) Ltd. stall at Expo 75.