AKA (Label): MODEL UA 121, Product number (P/N): UA121 (UA 121),
Keywords/Tags: UA121 (UA 121) | 90S
Date of intro: ~feb-1976, Origin: Japan (List), Dimensions: 118x74x20mm,
Power: 6V: (AAA x4),
Display: Type = Display (VFD) (List),
Number of keys: 22, #Key-Black: 8, #Key-Blue: 3, #Key-White: 11,
Keyboard Array (Rows x Columns): 05x05,
Miscellaneous switch: [on-off],
Classification: / Pocket,
Featuring: Procent, Square root, PI, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Related with: ROYAL_docu: (Ad.) *: The keys to buying the right calculator (version-1); ROYAL_docu: (Ad.) *: The keys to buying the right calculator (version-2),
Resemblance with: IMPERIAL: 90S, (Resemblance 033),
Serie-members: ROYAL: 90S (version-1) (Black); ROYAL: 90S (version-2) (Beige),
Known Serial-numbers: 90S025945a (90S 025945 (a)) | 90S040232a (90S 040232 (a)) | 90S69175621 (90S 69.175.621) | 90S69185585A (90S 69.185.585 A) (List of all S/Ns from ROYAL)
Collector value: 7/10,