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 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 visitors at De Beers plant.

Black and white negative of visitors at De Beers plant. Negative missing.

Black and white negative of visitors at De Beers plant.

Black and white negative of visitors at De Beers plant.

Black and white negative of visitors at De Beers plant.

Black and white negative of visitors at De Beers plant. Negative missing.