Keywords/Tags: 121F
Date of intro: ~1977,
Power: AC,
Display: Type = Display (VFD) (List), Digits = 12+1,
Number of keys: 24, #Key-Black: 11, #Key-Blue: 9, #Key-Orange: 4,
Classification: / Desktop with Display,
Featuring: Procent, Square root, Memories: 1,
Related with: CITIZEN_docu: (Broch.) Desk-top Calculators, Hand-held Calculators,
Serie-members: CITIZEN: 121F (version-1) (1 Switch); CITIZEN: 121F (version-2) (3 Switches, 24 Keys); CITIZEN: 121F (version-3) (3 Switches, 25 Keys),
Collector value: 7/10,
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