1973

• Production : 1973
• Display : LED 6
• Power : 9V
• Made : USA


• Very simplified model : do not own
  a "=" key and the display as only
  6 digits


• Advertising

1975

• Production : 1975
• Display : LED 8
• Power : 9V
• Made : Malaysia


• Identical to the Sceptre 821

1975

• Production : 1975
• Display : LED
• Power : 9V
• Made : USA


• Scientific model
• A non-HP RPN calculator


• Additional information
• Advertising

1978

• Production : 1978
• Display : LED 8
• Power : 9V
• Made : Hong Kong


• Additional information

1980

• Production : 1980 ?
• Display : LCD 8
• Power : 3V
• Made : Taiwan