1969 JW_SIGP_PLG_PRINT_MESSAGE: https://johnbarry.org.uk/vassall/index.php/press/41-1960s#sigProGalleria00b23a869c
1968 JW_SIGP_PLG_PRINT_MESSAGE: https://johnbarry.org.uk/vassall/index.php/press/41-1960s#sigProGalleriac6ae8d620d