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@slimtim
They are singlespeed disc brake hubs. I was told they were off a Genesis Day one but I'm starting to doubt that as the Day One wheels seem to all have cartridge-type bearings. There is no branding.
So I'd say they are pretty current and mass market. I can find references to the nine 1/4 inch ball rear hub configuration online so I don't think it's that unusual. I just can't find a corresponding cone, which seems bizarre.
I had a look at the Wheels Manufacturing site but they show the size of the cone but don't explain what size bearings it is for - this would be more useful I think!