The (late model) star hubs have a heavier, machined flange. These came out around 1957 and lasted until 1966. Heavier duty for the new hydraulic brake I assume? They also added a grease zerk (through the star cover). I'll rebuild this one and run it on the rear wheel. Races are good.
Lots o' parts to these suckers . . . over 50+ parts. About 6 parts for a Timken hub.
Star thrust plate and cover (with zerk) 1957-1966.