AKA (Label): CAT. NO. 65-642, MODEL EC-421, Product number (P/N): 65642 (65-642),
Keywords/Tags: 65642 (65-642) | EC421 (EC-421) | 421
Date of intro: 1977, Origin: Taiwan (List), Dimensions: 133x76x23mm,
Power: 3V: (AA x2) + Adaptor, Adaptor: RADIO SHACK_adaptors: 65-735,
Display: Type = Display (VFD) (List), Digits = 8+1,
Number of keys: 29, #Key-Black: 13, #Key-Brown: 4, #Key-Red: 1, #Key-White: 11,
Miscellaneous switch: [POWER_OFF-ON],
Classification: / Pocket,
Featuring: Procent, Square root, PI, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip, Memories: 1,
Known Serial-numbers: 15770211A7 (157702, 11A7) | 158328 | 16235212A7 (162352, 12A7) (List of all S/Ns from RADIO SHACK)
Collector value: 7/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),