AKA (Label): CLASS 18, NO. 18-21, Product number (P/N): 1821 (18-21),
Keywords/Tags: 1821 (18-21)
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,
Original Equipment Manufacturer : BUSICOM: 121DK (version-1), Made by: BUSICOM (List of all Import-OEM-models for NATIONAL CASH REGISTER (NCR)),
Known Serial-numbers: 182119832282 (18-21 1-9832282) (List of all S/Ns from NATIONAL CASH REGISTER (NCR))
Collector value: 8/10,