The pictures here are of Deep Purple Mk 3 - live at The California Jam, Ontario Speedway, on April 6th 1974. The photographs were taken by Robert Ellis and appear with his kind permission. All images are copyright 1974 Repfoto. The images were used in the 1981 Concert Publishing DPAS magazine, now available to read online.
You can see the first page of photos from the show here,

Click on the small images for more detail

The images must not be copied without the written permission of the photographer.