Vox Sound Equipment Limited Super Foundation Bass cab
A Vox Sound Equipment Limited Super Foundation Bass cab from 1969 - note the handles let in the sides. There is still gold string round the cabinet however. Twenty-two screws secure the back. The original Goodmans 18" driver is still in place. The cab's grille cloth has been renewed.
From 1968 these single-speaker Super Foundation Bass cabs were produced in parallel with twin speaker versions, sometimes termed "Super Twin Foundation Bass" units. These last, which were the same size as the single-speaker variety, did away with the port at the foot of the cab (see below).
For an overview of Super Foundation Basses, see this page (amps and cabs), and this (mostly cabs alone).