CALCUSEUM KEYSTONE: 2040

KEYSTONE: 2040
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	Date of intro: 1975, Origin: USA (List), Dimensions: 152x81x40mm, Weight: 220g, Power: Rechargeable, Adaptor: KEYSTONE_adaptors: 775; KEYSTONE_adaptors: 775E, Display: Type = Display (Gas disharge) (List), Digits = 8+1, Number of keys: 22, Classification: / Pocket, Featuring: Procent, Square root, Memories: 1, Known Serial-numbers: C726794 (C 726794) \| C726914 (C 726914) (List of all S/Ns from KEYSTONE) Collector value: 8/10, Courtesy of: CALCUSEUM (Serge DEVIDTS),
Item

Date of intro: 1975, Origin: USA (List), Dimensions: 152x81x40mm, Weight: 220g,
Power: Rechargeable, Adaptor: KEYSTONE_adaptors: 775; KEYSTONE_adaptors: 775E,
Display: Type = Display (Gas disharge) (List), Digits = 8+1,
Number of keys: 22,
Classification: / Pocket,
Featuring: Procent, Square root, Memories: 1,
Known Serial-numbers: C726794 (C 726794) | C726914 (C 726914) (List of all S/Ns from KEYSTONE)
Collector value: 8/10,
Courtesy of: CALCUSEUM (Serge DEVIDTS),

Item


Instructions Instruction Manual (Front) 20404010SC6543300 (2040/4010/SC654/3300)	Instructions Instruction Manual (Rear) 20404010SC6543300 (2040/4010/SC654/3300)	Label, name plate S/N: C726914 (C 726914)

Created: 30-oct-2011, Manual-update: 26-mar-2019, Batch-update: 25-feb-2024

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