Manufacturer: BUSICOM
Model: 120DM
AKA: junior
Year: ~1970
Display:  
Circuits:  
Dimensions: 274x160x95 mm
Power type: AC 
Origin: Japan

 

Feature  

Description 

Case:  

 

Color case:  

 

Color keyboard:  

 

Weight:  

3000 g

Voltage selection:  

Battery 1.2 AH 3x (6V)

Adapter:  

 

Power consumption:  

 

Working condition:  

 

Printed Circuit Boards (PCB's):  

 

Memories:  

 

Memories indication:  

 

Prog. steps:  

 

Decimal point handling:  

Via switch on keyboard '4-3-2-0'-position.

Rounding:  

 

Calculation overflow indication:  

 

Input overflow indication:  

 

Divide by Zero indication:  

 

Square root of negative value indication:  

 

Negative value indication:  

 

Constant function:  

 

Calculation speed:  

 

Auto Power-off:  

 

Display details:  

 

Printer:  

 

Extra features/remarks:  

Identical to BUSICOM: 120DM (version 1),
but this model has a 'rechargeable batteries'-service on board,
also 3 extra 'CHARGING', 'AC' and 'BAT.LOW'-lamps.
Charging time (calc. Off): 8-10 hours
Charging time (calc. On): 20-30 hours

Initial price:  

 

Overall quality rate (1-10):  

 

OEM-copies:  

PAILLARD: M12, NCR: 18-16 (Vintage Calculator Web Museum) 

Other sources of info:  

 

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