AKA (Label): MODEL 990,
Date of intro: apr-1968, Origin: Japan (List), Dimensions: 381x305x152mm, Weight: 6000g,
Power: AC,
Display: Type = Display (Nixie) (List), Digits = 16, Extra Display features: Type = Display (Neon bulb) (List), Quantity = 20,
Number of keys: 28,
Decimal switch: [0-2-4-6-8-10], Round switch: [(ArrowUp)-5/4-(ArrowDown)], Miscellaneous switch: [ON-OFF COUNT-M2-SUM OPD.],
Classification: / Desktop with Display / Memory (delay line),
Featuring: Logic-technology: SSI: DTL (Diode Transistor Logic), Memories: 2, Memory-technology: Memory (delay line),
Related with: MONROE_docu: (Broch.) *: The Calculator company... (820A,920,950,990),
Main Components: (170 ICs),
Original Equipment Manufacturer : CANON: 163, Made by: CANON (List of all Import-OEM-models for MONROE),
Serie-members: MONROE: 920; MONROE: 925; MONROE: 950; MONROE: 990,
Known Serial-numbers: S113077 (List of all S/Ns from MONROE)
Initial Cost Price: USD1250.00, Collector value: 9/10,
Internet: Link-1: THE OLD CALCULATOR MUSEUM, Link-2: YouTube