Product number (P/N): 350,
Keywords/Tags: 350
Date of intro: ~1973, Dimensions: 130x80x45mm, Weight: 185g,
Power: 6V: (AA x4) + Adaptor, Adaptor: KEYSTONE_adaptors: 375,
Display: Type = Display (PANAPLEX II) (List), Brand = BURROUGHS: BR09250M,
Number of keys: 18, #Key-Black: 11, #Key-Brown: 3, #Key-Yellow: 3,
Keyboard Array (Rows x Columns): 05x04,
Decimal switch: [DECIMAL_Normal-$], Miscellaneous switch: [Off-On],
Classification: / Pocket,
Featuring: Procent, Logic-technology: VLSI (Very Large Scale Integration), calculator-on-a-Chip,
Serie-members: KEYSTONE: 350 (version-1) ('Keystone'-notation, 2 yellow Keys on dark background); KEYSTONE: 350 (version-2) ('Keystone'-notation, No yellow Keys on dark background); KEYSTONE: 350 (version-3) ('Keystone'-notation, 2 blue Keys on dark background); KEYSTONE: 350 (version-4) ('Berkey KEYSTONE'-notation),
Known Serial-numbers: C247785 (List of all S/Ns from KEYSTONE)
Collector value: 8/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS), Donation of: SAMANTHA Julia,