Hello. This is my last chance. My dad had an old computer. It was simular to DTK Tech 1667. He remembers it had a hdd, turbo button, 1,25 floppy drive, and it was a intel 386 or 386 sx based pc. Here is a photo from 1997. He got it at 1995 with ms-dos 1, and program (it is czech program) Manager. In czechia its called Manažer from Software 602. Here is the photo https://imgur.com/a/Axp8i3y