Tesla Piešťany PMD 85

Notes from Wikipedia:

The PMD 85-0, a prototype produced by Tesla Piešťany (author was Roman Kišš),[6] was originally in a white-coloured case and later in some other colours. It is quite rare today.

The PMD 85, produced by Tesla Piešťany since 1985, was known as the PMD 85 or PMD 85-1.[7][8][9] It was made with a dark gray case, and was known for its keyboards with extremely tough keys. Alphanumeric keys were evaluated at the moment of a key release.

The PMD 85-2,[10][11][12] produced by Tesla Piešťany since 1986,[7] introduced some improvements in BASIC, some in input routines (for instance, key autorepeat), a more ergonomic keyboard (but less mechanically reliable) and also terminal mode. Some of the changes caused it to be not completely backward compatible.

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The PMD 85-3,[4][14] produced by Tesla Bratislava since 1988,[15][7] added colour TV output. Character encoding included all Czech and Slovak characters, and a Cyrillic version was also produced. System memory was enlarged to 8 KiB and monitor included routines for communication with PMD 32 floppy disk assembly, a ROM integrity test and also "PMD 85-2 compatibility mode" by relocation.