That dealer plate is common on Herbert-branded equipment since they were once one of the largest machinery manufacturer in the world so they had vast leverage on branding. If it was a machine actually produced by Herbert, it would be all over the castings instead of just on a rivet plate.
That's definitely a South Bend or a copy of one. Are there any more photos of it, or any evidence of what the ND stands for?
EDIT: Here you go Trevor, a discussion on the very same subject from 12 years ago. It's a shame that the photos are gone, it might possibly be the same lathe.
https://www.practicalmachinist.com/vb/general/anyone-ever-heard-nd-lathe-144669/
Edited By Pete Rimmer on 27/09/2018 23:47:31