Goodmans Speakers

Does anyone know anything about Goodmans of England Audiom 852 woofers? I found a pair of them together with a matching pair of Goodmans Midax 100 horns. I have searched high and low on the www and have found no information whatsoever on these woofers. They have very low serial numbers so I expect the production run was not long.

These must be the heaviest 12 inch drivers I have ever lifted! They are rated at 45 British watts RMS.

Thanks