AKA (Label): MODEL 1640 ELECTRONIC CALCULATOR, Product number (P/N): 1640,
Keywords/Tags: 1640
Date of intro: ~1975, Origin: Hong Kong (List), Dimensions: 132x68x25mm,
Power: 9V + Adaptor,
Display: Type = Display (LED) (List), Digits = 8+1,
Number of keys: 24, #Key-Black: 11, #Key-Brown: 8, #Key-Red: 5,
Classification: / Pocket,
Featuring: Procent, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip, Memories: 1,
Resemblance with: (Resemblance 006),
Known Serial-numbers: 164033703 (1640 33703) | 16408 (List of all S/Ns from RADOFIN)
Collector value: 7.5/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1: VINTAGE CALCULATORS WEB MUSEUM