Celestion 12in Speaker (used)

Cast chassis, ceramic magnet, aluminium dust cover, 8 Ohms

I can't find anything about this speaker on the internet, but judging by the use of pozidriv screws to hold the magnet cover on, it must be post 1963 

The cone appears to be stamped 1115 - again no help in identification.

It has a good size magnet, and a 3in voice coil.

It is a beefy unit is at approx 8kg (18lb)