AKA (Label): MODEL 640, Product number (P/N): 640,
Keywords/Tags: 640
Date of intro: 1971, Origin: Japan (List),
Power: AC,
Display: Type = Display (Nixie) (List), Digits = 16,
Number of keys: 28, #Key-Black: 28,
Decimal switch: [0-1-2-3-4-5-6-7-8-9-10-12], Round switch: [(ArrowUp)-5/4-(ArrowDown)], Miscellaneous switch: [(Delta)x-(Blank) ACC-(Blank)], Indicators: OVERFLOW,
Classification: / Desktop with Display,
Featuring: Logic-technology: LSI (Large Scale Integration), calculator-chipset, Memories: 2,
Related with: MONROE_docu: (Broch.) *: 16 gute Gründe warum...; MONROE_docu: (Instr.) *: 640,650,
Serie-members: MONROE: 640; MONROE: 650,
Known Serial-numbers: E296204 (E 296204) (List of all S/Ns from MONROE)
Collector value: 9/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),