AC Ford AC810 Lanterns

Lichfield Cathedral 

The AC Ford AC810 lantern is an exceptionally rare lantern which I only know of to exist (at least near me) in Lichfield. This one is on a decorative wall bracket just opposite Lichfield Cathedral, running (presumably) an MBF lamp. The lantern does have a mini-cell fitted but it isn't visible here. It is unknown if this AC810 still works.

The metal ring which keeps the bowl situated can be seen better from below...