The Robotron 6313 printer was a 9-needle pin dot matrix printer manufactured by the VEB Robotron (East Germany)
What made it special and worth mentioning in the CPC-Wikipedia is the fact that it could be DIP-switched to be 100% compatible with the Amstrad/Schneider NLQ401, that means it could print the whole CPC character set and understood the code sequence to switch the 8th bit.