This article on lathes.co.uk, on overhauling some bits of an earlier model Hercus, is an interesting read - doesn't seem to be linked from the main Hercus page there.
http://www.lathes.co.uk/hercusapron/steammachine.com/hercus/index-2.htmlLooks like most Hercus lathes used roller bearings both ends of the spindle.
Oh, and Hercus still refurbish these lathes, at $3k+.....