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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