Black and white negative of a De Beers drilling demonstration. Negative missing. [Given to Noel Jordan?]

Black and white negative spares of a De Beers drilling demonstration.

Black and white negative of a De Beers drilling demonstration. Negative missing. [Given to Noel Jordan?]

Black and white negative of the DeBeer Extension.

Black and white negative spares of the [DeBeer Extension?]

Black and white negative of the [DeBeer Extension?]

Black and white negative of the [DeBeer Extension?]

Black and white negative of the [DeBeer Extension?]

Black and white negative of the [DeBeer Extension?]

Black and white negative of the [DeBeer Extension?]