Tadeo Czerweny S.A.[1][2][3] is an Argentinian manufacturer of transformers and other high-power electrical equipment founded by Tadeo Czerweny in 1958.[2]
These machines had their hardware supplied by Timex Portugal, the portuguese branch of Timex Sinclair.[5] Since Czerweny computers used Timex Sinclair chips and ROMs, their compatibility was close to 100% relative to the original Sinclair machines.[8] They also look similar to the original Timex models. The CZ 1000 was a relabeled Timex Sinclair 1000, the CZ 1500 was similar to the Timex Sinclair 1500 and the CZ 2000[12] is a Spectrum compatible in a Timex Sinclair 1500 case.[8]
Afterwards, imported components were replaced with locally produced variants, and extra modifications were added, like a joystick port, composite monitor output and a restart button.[5] This gave origin to new models, released in 1986 with original Czerweny cases: CZ 1000 Plus,[13][14][8][3]CZ 1500 Plus[15][8], CZ Spectrum[16][17] and CZ Spectrum Plus.[18][19] About 4000 machines were produced each month.[5] Czerweny models competed in Argentina with the Brazilian TK 83, 85, 90x and genuine Sinclair machines, but were more successful.
The Paraná, Entre Rios province factory was destroyed by a fire in 1986, eventually ending Czerweny computer production.[5]
CZ 1500 Plus - A CZ 1500 with the same improvements as the CZ 1000 Plus.[15][8]
CZ Spectrum - A CZ 2000 with the same improvements as the CZ 1000 Plus in a larger box.[16][17]
CZ Spectrum Plus - A Sinclair ZX Spectrum clone in a Spectrum+ box, with added joystick ports, composite monitor out, a reset button and Sinclair BASIC messages were translated into Spanish.[18][19]
^ abcdefghijZangoni, Néstor (2005-01-07). "CZERWENY Series (CZ) Argentina (Z80A)". MicroHobby Web independiente para usuarios de ordenadores Sinclair y compatibles (in Spanish). Retrieved 2023-01-16.