Vintage Electronic Calculators:

Overview of Brands


ROYAL: 90K (version-1)
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AKA (Label): MODEL UA 120, Product number (P/N): UA120 (UA 120),
Keywords/Tags: UA120 (UA 120) | 90K
Date of intro: ~1975, Origin: Japan (List), Dimensions: 114x70mm,
Power: 6V: (AAA x4),
Display: Type = Display (VFD) (List),
Number of keys: 19, #Key-Black: 5, #Key-Blue: 3, #Key-White: 11,
Miscellaneous switch: [on-off],
Classification: / Pocket,
Featuring: Procent, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Related with: ROYAL_docu: (Ad.) *: The key to buying the right calculator; ROYAL_docu: (Instr.) 90K,
Resemblance with: IMPERIAL: 90K, (Resemblance 033),
Serie-members: ROYAL: 90K (version-1) (Black); ROYAL: 90K (version-2) (Beige),
Known Serial-numbers: 90K033681 (90K 033681) | 90K044975a (90K 044975 (a)) | 90K691100869 (90K 69.110.869) | 90K69123434 (90K 69.123.434) (List of all S/Ns from ROYAL)
Collector value: 7/10,


Created: 13-jun-2014, Manual-update: 09-jul-2020, Batch-update: 14-aug-2022             

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