Love the old Breezers. Had a chance to get one for a song but it wasn't my size so I passed on it. Hopefully it's getting some love as yours is. That cassette: Looks to me like a basic HG50 Shimano. Works great and will last, but neither light nor fancy. I have an 8 speed NOS XT cassette here, and it has an aluminum carrier holding the cogs together. XTR would be similar.