The Krause catalog type is KM# 175, but there are many variations. The Schön catalog has # 61, 62, 63, and A63 that are all covered by KM# 175, and I have a coin that I identify as Schön# 62 v. (I don't have one that matches the Schön# 62 image.)
I don't have access to that book right now so I don't know which the pictured coin is.
Rarity is hard to tell as most German states coins aren't up for sale at any particular time.