AKA: 1540 D, AKA (Label): ELECTRONIC CALCULATOR, Product number (P/N): 1540D (1540 D),
Keywords/Tags: 1540D (1540 D)
Date of intro: ~1975, Origin: Hong Kong (List), Dimensions: 152x76mm,
Power: 3V: (AA x2),
Display: Type = Display (VFD) (List),
Number of keys: 25, #Key-Blue: 13, #Key-Red: 1, #Key-White: 11,
Keyboard Array (Rows x Columns): 25,
Miscellaneous switch: [(Blank)-ON],
Classification: / Pocket,
Featuring: Procent, Square root, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip, Memories: 1,
Collector value: 7/10,