A front mudguard stay/stand to fit a range of Nortons.
 
These are made from 1/2" tube, measure 14 1/8" from the fixing plate to the centre line of the fork mounting holes and 6 3/4" between these mounting holes. The arms bend in and out relatively easily so this last measurement is easily 'tweaked'. 
 
They are very nicely made, here in the UK, and are supplied in bare metal so you can paint to match the rest of your bike,