AKA: exec, 121-DK, AKA (Label): NCM, 121-DK, Product number (P/N): 121DK (121-DK),
Keywords/Tags: 121DK (121-DK) | exec
Date of intro: 1972, Origin: Japan (List), Dimensions: 242x161x58mm, Weight: 1100g,
Power: AC,
Display: Type = Display (VFD tube) (List), Digits = 12,
Keyboard: Reed-switch, Number of keys: 23, #Key-Blue: 12, #Key-White: 11,
Keyboard Array (Rows x Columns): 05x06, Keyboard Layout: [EX] - [CM] [7] [8] [9] [x] [(Division)] - [RM] [4] [5] [6] [+] [-] - [CE] [1] [2] [3] [M] [M] - [C] [0] [.] [=],
Decimal switch: [9-6-5-4-3-2-1-0], Round switch: [N-5/4], Miscellaneous switch: [M+-M+(Minus)= ON-OFF], Indicators: NEGATIVE OVERFLOW MEMORY,
Classification: / Desktop with Display,
Featuring: Memories: 1,
Related with: BUSICOM_docu: (Instr.) 121DK; BUSICOM_docu: (Broch.) 121DK (version-1); BUSICOM_docu: (Broch.) 121DK (version-2),
Main Components: BUSICOM: QP39220,
Original Equipment Manufacturer : BUSICOM: 121DK (version-1) (List of all Export-OEM-models from BUSICOM), Resemblance with: NATIONAL CASH REGISTER (NCR): 18-21,
Known Serial-numbers: 30QB142057 | 30RB142942 | 30TB144298 (List of all S/Ns from BUSICOM)
Initial Cost Price: 69800 JPY (€ 565,38), Collector value: 8.5/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1: CURTAMANIA, Link-2: Robert LACOSTE, Link-3: YouTube