Discovered i had a Regina Extra cassette on a Weinman rim i got off an Austro Daimler AD-SL bike i purchased yesterday. I've looked at other Regina Extras online but they are more like a compact cassette compared to mine. There is holes punched all around the last two gears, the gearing is 14-16-20-24-28. Is it worth using for myself or should i sell it? If anybody has info on this gear i'd love to know more, thanks.