AKA (Label): ELECTRONIC CALCULATOR, Product number (P/N): PR20,
Keywords/Tags: PR20
Date of intro: ~1975, Origin: Japan (List), Dimensions: 124x80x21mm, Weight: 170g,
Power: 3V: (AA x2) + Adaptor,
Display: Type = Display (VFD) (List), Digits = 8+1,
Number of keys: 22, #Key-Grey: 10, #Key-Red: 1, #Key-White: 11,
Miscellaneous switch: [OFF-ON],
Classification: / Pocket,
Featuring: Procent, Square root, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Main Components: TOKYO ELECTRONIC APPLICATION LAB (TEAL): 53421A,
Resemblance with: (Resemblance 015_05_05_22A), Made by: TEAL (List of all Import-OEM-models for KARSTADT),
Known Serial-numbers: 129893 | 138060 (List of all S/Ns from KARSTADT)
Collector value: 7/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1: SCHLEPPTOPS Rechnerwiki