50s 60s stoneware vase? Need help with ID.

Found this vase in a charity shop the other day, nearly overlooked it as it's not my usual type of thing, however, I've now decided I love it, looks great with a bunch of dahlias in it! Google searches have thrown up nothing similar so far. It has a raised hand-painted pattern, and a beautiful green glaze inside. Numbers to base which I can't work out. Could be 80212, 802/2, or perhaps that is a B at the beginning? Is it stoneware? I know nothing about ceramics so am guessing. Would like to know a bit about its history so if anyone has any ideas I'd be grateful.

It's one of the West German manufacturers. Others will know better than me which one.

Probably not much help but my guess would be for Ruscha, I could be very wrong though.