Unusual Omni directional Wharfedale Super 8

Hi everyone
not been here for some while so please excuse me if I use wrong posting etiquette. I bought a pair of Wharfedale Super 8 RS/DD drive units and the units shown in the attached pics . I have not seen these before, they look original with metal cone and what looks like original covers. Can anyone tell me what they are? I think they are used in some sort of omni directional cabinet but hopefully some one can tell me who made them (Wharfedale?) , originality and if still worth using?
Thanks
mouse
 

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@ammers2

I thought you might be interested in seeing this complete Wharfedale Circular Column kit for 8" units which I've spotted at auction.
 

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