I've got an old Dura Ace Rear hub that has gold sticker around the slightly fatter part of the hub near the freewheel. I'd say the hub is anywhere from an 80's to 90's model. It currently has a six speed cluster with with index cogs 13-28 with camphered teeth. It appears to have splines where the cogs go on like a modern hub. There are no splines on the inside of the freewheel for a freewheel remover tool. Sorry if I come across ignorant. But the only hubs I've worked with are screw on cassettes. There are three small bolts screwed into the biggest cog that seem to act as a spacer. Any help here would be appreciated.

Thanks

Cat