AKA: SPERRY RAND, AKA (Label): MODEL 661, Product number (P/N): 661,
Keywords/Tags: 661
Date of intro: ~1972, Origin: Japan (List), Dimensions: 150x78x43mm, Weight: 205g,
Power: 6V: (AA x4),
Display: Type = Display (VFD tube) (List), Digits = 6,
Number of keys: 16, #Key-Grey: 6, #Key-White: 10,
Classification: / Pocket,
Featuring: Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Related with: REMINGTON_parts: (Box) 661,
Main Components: CASIO: 6E1A; CASIO: 6E2B,
Resemblance with: (Resemblance 096A), Made by: CASIO (List of all Import-OEM-models for REMINGTON),
Known Serial-numbers: 365080 (List of all S/Ns from REMINGTON)
Collector value: 8/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),
Internet: Link-1: VINTAGE CALCULATORS WEB MUSEUM, Link-2