AKA (Label): EC-450, SCIENTIFIC CALCULATOR,
| EC450 (EC-450) | SCIENTIFIC CALCULATOR
Date of intro: 1974, Origin: USA (List), Dimensions: 133x83x75mm, Weight: 185g,
Power: Rechargeable,
Display: Type = Display (LED) (List), Brand = BOWMAR: Optostic, Digits = 8+1,
Number of keys: 25, #Key-Blue: 1, #Key-Red: 1, #Key-White: 23,
Miscellaneous switch: [(ArrowLeft)DEG-RAD(ArrowRight) ON(ArrowRight)-(ArrowLeft)OFF],
Classification: / Pocket,
Featuring: Scientific functions, Square root, PI, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Main Components: ROCKWELL: A4001,
Other components: ITT: ? {4x},
Original Equipment Manufacturer : BOWMAR: 92001 (version-1), Resemblance with: BOWMAR: 92001 (version-1); SEARS: 41024 (version-1), Made by: BOWMAR (List of all Import-OEM-models for RADIO SHACK),
Known Serial-numbers: 103755 | 107074 (List of all S/Ns from RADIO SHACK)
Initial Cost Price: USD129.95, Collector value: 8/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Info: First scientifical calculator from RADIO SHACK
Internet: Link-1: THE VINTAGE TECHNOLOGY ASSOCIATION