Vintage Giant 6x5x3″ Masscool Fanner Tech Copper Heatsink CPU Fan
The copper fins is likely plated, but the tubes and plate may actually be solid. It can be run as it is, but if you are building a retro machine, you may want to clean it up more and maybe put a fan with working lights in it.
Masscool 80mm Quiet Cooling Fan 3-Pin Motherboard & 4-Pin Molex PSU (4-Pack)
4 x Masscool 80mm Cooling Fans. Feature: Quiet Operation.