AKA: MARK 31, AKA (Label): mark 31, SLIDE RULE CALCULATOR, Product number (P/N): 31,
Keywords/Tags: 31 | MARK 31 | 315500
Date of intro: ~1975, Origin: Japan (List),
Power: 9V,
Display: Type = Display (VFD) (List),
Number of keys: 27, #Key-Black: 11, #Key-Red: 8, #Key-White: 8,
Keyboard Array (Rows x Columns): 06x05,
Classification: / Pocket,
Featuring: Procent, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Known Serial-numbers: J001047 (J-001047) (List of all S/Ns from APF)
Collector value: 7/10,
Internet: Link-1: SMITHSONIAN MUSIC