I think this may be the clock Elektor published in 1975 - it could use either Mintoron or LED displays.
I've uploaded the two copies of Elektor to the group's library at https://drive.google.com/drive/folders/0B93DAeV7sPGsc1hfaTZrMG9ZS3c <https://drive.google.com/drive/folders/0B93DAeV7sPGsc1hfaTZrMG9ZS3c> They're in directory: *NEONIXIE-L > Project Designs (clocks, etc.) > Elektor TTL Minitron Clock 1975* The TTL clock is in the 1975-09 (September) edition, page 918 and it uses the previously published Minitron/LED "Universal display" from the 1975-02 (February) edition, page 223. HTH Nick -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/7a86205b-fe87-4ec4-befd-92aa8a629e1f%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.