That's a cool piece of history you've got there! "Made in W Germany" definitely dates it nicely. Roxy cymbals from that era are relatively rare and often underrated. While not as sought-after as some of the bigger brands, they can have a unique, dry sound. Might be worth looking into some vintage drum forums; someone there might know more about their specific alloys and production methods back then. Almost like finding a perfectly tuned car in Drift Hunters, it's about discovering the hidden potential! Hope you find some more info!