AKA: Berkey 4030, Made in U S A, Product number (P/N): 4030,
Keywords/Tags: 4030 | Berkey
Date of intro: ~1974, Origin: USA (List),
Power: 6V, Adaptor: KEYSTONE_adaptors: 775; KEYSTONE_adaptors: 775E,
Display: Type = Display (Gas disharge) (List), Digits = 8+1, Extra Display features: Type = Display (LED: as bulb) (List), Quantity = 2,
Number of keys: 30, #Key-Black: 2, #Key-Green: 10, #Key-White: 18,
Miscellaneous switch: [Rad.-Deg. OFF-ON], Indicators: Low Chg.,
Classification: / Pocket,
Featuring: Scientific functions, Square root,
Known Serial-numbers: 024698? (List of all S/Ns from KEYSTONE)
Collector value: 8/10,
Internet: Link-1: SMITHSONIAN MUSIC

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