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Unimark 280

The Unimark 280 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 7 functions, 23 keys and one of the early LCD (liquid crystal) displays which incorporated a yellow filter. The power source is 4x1.35V cell.

Facts at a glance:

Type Arithmetic
Functions 7
Keys 23
Precision 8
Logic Algebraic
Display type YLCD
Display size
Length 127 mm
Width 72 mm
Thickness 12 mm
Weight unknown g
Power Source 4x1.35V cell
Original price unknown
Est. current value unknown
Year introduced 1975
Year discontinued

See other calculators manufactured by Unimark.