I don't understand -- both posted photos clearly say Mostek on them. On Sunday, February 25, 2018 at 1:56:07 AM UTC-6, Nick wrote: > > Just saw this - any ideas what the chip could be - looks like a Mostek > ceramic package, but could be anyone. Not an MK 5314 but package looks like > that used on some Mostek chips, e.g. the MK 2927.and 5011P (see attached). > Perhaps a bespoke chip? Russian? > > The nixies are Rodan GR-116D, which are Japanese.Not that means a lot. > > > http://worldphaco.com/uploads/THE_1972_DIGEEC_NIXIE_CLOCK_FROM_EUROPEAN_ELECTRIC_COUNTING_AND_THE_MYSTERY_28_PIN_CMOS_LSI_CHIP.pdf > > Cheers > > Nick >
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