Unitrex UC 25

Brief History

Eiko Business Machine, the owner of the well-known brand Unitrex, after Japanese manufacturing was no longer profitable due to unbeatable prices from Taiwan, Hong Kong and Singapore, switched to import OEM calculators from companies in these countries. The UC models are almost identical to the Microlith calculators; their manufacturer is the same. Note that the Microlith 113G was the first to show true demands for affordable priced pocket calculators in Hungary in 1976. The UC 25 is the smallest member of the family; in addition to the Rockwell-made CPU, LED display and Klixon-style keyboard, it has only a few resistors.

Technical specifications

Manufacturer:	Unitrex of Canada (Canada)
Mfg. date:	1976
Size:	7,2×13,4×2,4 cm
Weight (ready for operate):	n.a.
Type:	four-function
Capacity:	8 digits (input/display) 8 digits (internal precision)
Operating logic:	algebraic
CPU:	Rockwell B5000CB
Registers:	2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 1 memory (with aritmetic)
Features:	%calculation with percent Ffloating-point notation
Display:	9 digit LED (Rohm LAN-B-1)
Power:	9V battery or adaptor

Pictures

UC 25

Inside of the UC 25

Keyboard of the UC 25