This is the fork top nut used on all /5 and /6 bikes, and early /7 models too, that has the chrome plated top cap with the two holes for a peg spanner screwed into it (not included - see SUR34399). We have them with good if not perfect spanner flats. For a retro look it can be retrofitted to later bikes from 78 to 84 in conjunction with SUA63384 and SUA34399.