AKA (Label): MODEL 420, ELECTRONIC DISPLAY CALCULATOR, Product number (P/N): 420,
Keywords/Tags: 420
Date of intro: 1973, Dimensions: 216x203x89mm,
Display: Type = Display (Gas disharge) (List), Digits = 12,
Number of keys: 22,
Classification: / Desktop with Display,
Featuring: Memories: 1,
Serie-members: MONROE: 420 (version-1) (With [%]); MONROE: 420 (version-2) (Without [%]),
Known Serial-numbers: H598770 (List of all S/Ns from MONROE)
Collector value: 8/10,