Kinda rare and sometimes unheard of..Early on option for the Porsche 911/912.My 66/67 Deluxe 911 came with them & were virtually un- noticeable.Nice for those that need a little more elevation while driving...easy to install.Looks like a complete set.....http://www.ebay.com/itm/Porsche-356-911-912-1963-1967-Seat-Track-Rails-/151082400799?pt=Vintage_Car_Truck_Parts_Accessorie s&hash=item232d367c1f&vxp=mtr
Not mine by the way..(the rusted out part I believe is floorboard)