Inverted Prisms, Inwald

This 5-piece berry set sold in 2018 for $45. I'd not heard of this pattern before another (or perhaps the same one) sold at a 2015 online auction for sold for $35. Not much known about the pattern.

Glen and Stephen Thistlewood show this pattern on their site, although in other shapes, and credit it to the German firm Rindskopf.