AKA (Label): MODEL 831RD-III, ELECTRONIC CALCULATOR, Product number (P/N): 831RDIII (831RD-III),
Keywords/Tags: 831RDIII (831RD-III) | 831RD
Date of intro: ~1977, Origin: Japan (List), Dimensions: 165x86x22mm, Weight: 158g,
Power: 3V: (AA x2) + Adaptor, Adaptor: CITIZEN_adaptors: CTZ831RD,
Display: Type = Display (VFD) (List), Brand = NEC: FIP11A6A, Digits = 10+1,
Number of keys: 28, #Key-Blue: 16, #Key-Grey: 11, #Key-Orange: 1,
Decimal switch: [F-2-4-AM], Miscellaneous switch: [OFF-ON (ArrowRight)-(Sigma)],
Classification: / Pocket,
Featuring: Procent, Square root, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Main Components: NEC: D1001C,
Resemblance with: (Resemblance 007G),
Serie-members: CITIZEN: 831RD (2 Switches); CITIZEN: 831RDIII (3 Switches),
Known Serial-numbers: 01127028 (List of all S/Ns from CITIZEN)
Collector value: 7/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1: VINTAGE TECHNOLOGY