thanks for getting back to me so quickly mate.
Looking at your pic and also a picture of someone flogging an NOS on FB , I do have some sort of reproduction wheel as your boss and wheel are all one piece (by the look of it) ,
but mine can be separated by allen heads.
By pure luck on my behalf the steering column nut was only just nipped up so I grabbed both sides of the boss and it just came off..
First pic is the underneath of the boss, the broken indicator cancel explains why it was a bit dodgy cancelling the indicators.
thanks again for your help.

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