A multilined typeface by Rudolf Koch, released by Klingspor in 1931.
Also carried by Letraset and Mecanorma. Latter’s Prisma Neo is a distant cousin. Prismania is an adaptation and extension from the phototype era.
RMU offers the only commercial digital revival (Prisma Pro, 2011), but others have been produced, such as Pentaprism NF (referencing Prismania), and Practise/Lineto’s Prismaset, which is not yet publicly available.