The cover of Graphis 51 by Tom Eckersley, from 1950.
See some scans from the rest of the book here at the great vintage poster blog Quad Royal.
If you want to see more work by Tom Eckersley, I recently came across an archive of his work during my dissertation research. You can see 185 pieces by him here. He is a real classic poster artist, from a golden age of British design.