Only special sauce chip is what appears to be the firmware, NEC P/N
09F3632.
Battery is a Varta CR 2430, three lead, soldered to the PCB.
Two pairs of MC1488P/MC1489P
40.5504MHz and 24.5760 MHz oscillators.
NL1 neon lamp...
Video manipulation is possumbly handled by the Zilog Z0840006PSC CPU
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