Product number (P/N): 21A,
Keywords/Tags: 21A
Date of intro: ~1965,
Power: AC,
Number of keys: 27, #Key-Black: 3, #Key-Blue: 4, #Key-Red: 4, #Key-White: 13, #Key-Yellow: 3,
Classification: / Desktop,
Featuring: Square root, Logic-technology: DTL (Diode Transistor Logic), discrete components,
Resemblance with: ELKA: 6521,
Known Serial-numbers: 1077 (List of all S/Ns from ELKA)
Collector value: 9/10,