Based on Prisma. Initially shown by Photo-Lettering as Neon. [PLINC One Liner 1971]
No official digital version currently available. Among the unsatisfactory attempts are Neptune (FontBank, 1990–1993) and the shadowed Multistrokes (Manfred Klein, 2003). See NeoNeon (2022) for a better drawn rendition.
Photo(s) by Bart Solenthaler on Flickr.
Contributed by Florian Hardwig