Product number (P/N): 280,
Keywords/Tags: 280
Date of intro: ~1975, Dimensions: 90x51x12mm, Weight: 70g,
Power: Rechargeable,
Display: Type = Display (LED) (List), Digits = 8+1,
Number of keys: 19, #Key-SilverColor: 19,
Classification: / Pocket,
Featuring: Procent, Square root,
Resemblance with: (Resemblance 037),
Serie-members: STUDIOSONIC: 280 (version-1) (Textfont on keys none-Italic); STUDIOSONIC: 280 (version-2) (Textfont on keys Italic),
Collector value: 8/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),