TEMS 51 LAB
It was manufactured from 1988 to 1991 by Tesla Liberec. Hardware is based on MHB8031.
References
https://starepocitace.cz/skolni_a_jednodeskove/tems-51-lab/
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WebArchive
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http://www.krapfen.cz/~nostalcomp/tems4x.html
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WebArchive
)