These are the Aussie versions, I've seen the 5 hole ones but they are no longer available. Iirc the, aussie, company that made the 5 hole ones got bought out by the mob that makes these ones in the 1980s. Seen a few 510s running these, some as recent at this week!
Personally I'm not a fan of them generally, remember I'm a 720 guy, but they would look sweet on an ol'school 620 or earlier.