A small German company which manufactures computer monitors and terminals.
Their text terminals (I'm looking at model QVT 82 right now) have the ability to emulate SCO Unix, Wyse 60, Adds A2 and PC Term terminals as well as run in native mode. They have standard 101-key keyboards capable of sending both international characters and raw keyboard scan codes. They also have both 25-pin and 9-pin serial ports for a data or printer connection, and a 25-pin parallel port for a printer connection. The serial ports are capable of up to 19200 baud.
Right now I'm using a model QVT 82 that I got free from my summer job. It's about fifteen years old by the look and smell of it, but it's in perfect working condition. Probably a safer buy at a flea market than an equivalent Wyse terminal.