I'll probably get sued, shot and have my clothes burnt for using this without permission but a link to a photo of 3 bulldogs still in service in 1997 in Victoria.
The "B" is double-ended, the "S" class is single ended.
http://www.railpage.org.au/pix/diesel/B61-S302-S311_Dynon_09-11-1997.JPG
The "B" is double-ended, the "S" class is single ended.
http://www.railpage.org.au/pix/diesel/B61-S302-S311_Dynon_09-11-1997.JPG