Product number (P/N): 0531,
Keywords/Tags: 0531 | Classic | III
Date of intro: ~1975, Dimensions: 130x80x21mm, Weight: 110g,
Power: 3V: (AA x2) + Adaptor,
Display: Type = Display (VFD) (List), Digits = 8+1,
Number of keys: 24, #Key-Black: 12, #Key-Red: 1, #Key-White: 11,
Miscellaneous switch: [(Blank)-ON],
Classification: / Pocket,
Featuring: Procent, Square root, PI, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Resemblance with: (Resemblance 009),
Serie-members: MBO: Classic II (version-1) (22 Keys); MBO: Classic II (version-2) (24 Kyes),
Known Serial-numbers: 035199 (List of all S/Ns from MBO)
Collector value: 7/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),