This is the replica of the IEC64 card from the 80's. It provides a GPIB (IEEE-488) connection and plugs into the expansion port of the Commodore C64 or C128.
Who the original developer of the card was, I could not find out. It was sold by "WAW Elektronik", "Jann Datentechnik" and "REX Datentechnik" in different versions, but the technical base and the kernal was always the same. With the Kernal only the switch-on message had been adapted according to the company.
This is the version that was sold by "WAW Elektronik" at that time.