Microtek, Inc. (1983)

The RV-611 is a parallel printer interface for the Apple ][, ][+, and IIe. It was one of several cards produced by Microtek as part of the "Slotware" series for the Apple II. The RV-611 is fully compatible with Apple's Parallel Printer Card and can be used to connect most printers equipped with a parallel interface to an Apple II. The  end of the cable not shown in the photo has a standard "Centronics" printer connector to plug into the printer's parallel port.