Seagate ST-11M/11R 8-Bit ISA Hard Drive Controller. These are New old stock still in the factory sealed package! A very rare to find piece of computing history!!
With the ST-11M/11R BIOS
This is one of many vintage items from a computer store that closed in the early 2000's. It has been carefully stored since that time- see my other listings for more items, including many in their original packaging!