AKA: tip-in, Product number (P/N): GT538,
Keywords/Tags: GT538 | tipin (tip-in)
Date of intro: 1974,
Number of keys: 19, #Key-Black: 15, #Key-Red: 4,
Classification: / Pocket,
Featuring: Square root,
Resemblance with: (Resemblance 050),
Known Serial-numbers: 800582 | 80070 (List of all S/Ns from HELEC)
Collector value: 8/10,
Courtesy of: MUCKERMANN Peter,

!!! This item is WANTED to join the collection !!!