Product number (P/N): HP20,
Keywords/Tags: HP20
Date of intro: ~1975, Dimensions: 140x75x40mm, Weight: 100g,
Power: 9V + Adaptor,
Display: Type = Display (LED) (List), Digits = 8+1,
Number of keys: 19, #Key-Red: 3, #Key-White: 16,
Miscellaneous switch: [OFF-ON],
Classification: / Pocket,
Featuring: Procent,
Resemblance with: CALFAX: 890P (version-1); JULIETTE: 890P,
Known Serial-numbers: 416843 (List of all S/Ns from REVETRONIC)
Collector value: 7.5/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1: MULDER