AKA (Label): ELECTRONIC CALCULATOR, Product number (P/N): 121DN,
Keywords/Tags: 121DN
Date of intro: ~1977, Origin: Japan (List), Dimensions: 210x180x52mm, Weight: 866g,
Power: AC,
Display: Type = Display (VFD) (List), Brand = NEC: FIP13D10, Digits = 12+1,
Number of keys: 26, #Key-Black: 12, #Key-Grey: 12, #Key-Yellow: 2,
Keyboard Array (Rows x Columns): 04x07, Keyboard Layout: [(ArrowRight)] [7] [8] [9] [%] [EX] [CM] - [(SquareRoot)] [4] [5] [6] [x] [(Division)] [RM] - [C] [1] [2] [3] [+=] [-=] [M-=] - [CE] [0] [00] [.] [M+=],
Decimal switch: [A-0-2-4-F], Round switch: [(ArrowDown)-5/4-(ArrowUp)], Miscellaneous switch: [(Blank)-K POWER_(Blank)-ON],
Classification: / Desktop with Display,
Featuring: Procent, Square root, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Main Components: NEC: D1220C,
Resemblance with: (Resemblance 503),
Serie-members: BUSICOM: 121DC; BUSICOM: 121DN,
Known Serial-numbers: 7914337 | 7914646 (List of all S/Ns from BUSICOM)
Collector value: 7.5/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),