Product number (P/N): 240,
Keywords/Tags: 240
Date of intro: 1972, Origin: USA (List), Dimensions: 140x89x32mm, Weight: 190g,
Power: 6V: (AA x4) + Adaptor, Adaptor: KEYSTONE_adaptors: 375,
Display: Type = Display (Gas disharge) (List), Digits = 8+1,
Number of keys: 18, #Key-Black: 11, #Key-Blue: 3, #Key-Grey: 4,
Decimal switch: [DECIMAL_Normal-$], Miscellaneous switch: [CONSTANT_Normal-K (Blank)-On],
Classification: / Pocket,
Featuring: Procent, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Main Components: ROCKWELL: 15332PC,
Resemblance with: ATLAS-RAND: 240,
Known Serial-numbers: C080561 (C 080561) (List of all S/Ns from KEYSTONE)
Collector value: 8/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1: VIRTUAL MUSEUM OF CALCULATORS, Link-2: VINTAGE CALCULATORS WEB MUSEUM, Link-3: SMITHSONIAN MUSIC