AKA: MEMORY 20R, AKA (Label): Calculator Model 20R, Product number (P/N): 20R,
Keywords/Tags: 20R | MEMORY
Date of intro: ~jul-1974, Origin: United Kingdom (List), Mexico (List), Dimensions: 152x76x23mm, Weight: 134g,
Power: 9V + Adaptor,
Display: Type = Display (LED) (List), Digits = 8+1,
Number of keys: 20, #Key-Brown: 20,
Keyboard Array (Rows x Columns): 05x04, Keyboard Layout: [%] [MR] [M] [(Division)] - [7] [8] [9] [x] - [4] [5] [6] [-] - [1] [2] [3] [+] - [C] [0] [.] [=],
Classification: / Pocket,
Featuring: Procent, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip, Memories: 1,
Related with: ROCKWELL_docu: (Instr.) *: Die Antwort (20R,21R); ROCKWELL_docu: 2520D59R2407 (Instr.) 20R; ROCKWELL_docu: (Ad.) *: The Answers... (10R,20R,51R,63R,82RE,BSR,ESR); ROCKWELL_parts: 01R (Accessory Kit) 10R,20R,30R,
Components: 14 ... 2 Capacitor(s), 10 Resistor(s), 1 IC(s),
Main Components: ROCKWELL: A5300PA,
Original Equipment Manufacturer : ROCKWELL: 20R (List of all Export-OEM-models from ROCKWELL), Resemblance with: SEARS: 801.58240, (Resemblance 057),
Known Serial-numbers: 127829 | 159363 | 187968 | 199787 | 8A14885 (8A 14885) | 8A20662 (8A 20662) | 8A50095 (8A 50095) (List of all S/Ns from ROCKWELL)
Initial Cost Price: USD49.95, Collector value: 7.5/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1: VINTAGE TECHNOLOGY, Link-2: ANITA CALCULATORS