Looks like he has all the framework that would have come in this model. This type of seat track does NOT use the adjustable seat tracks and frame pictured in the link above and mentioned by o2batsea and is not needed. The only thing I notice is that the small right angle tabs at the front of the seat track are missing that the wooden ridge in the seatbase sits against, you will also need the leather straps that hold the seat in place to the knob/stubs on the front of the seatbox. Bob if you want some photos of how its supposed to go together I can send you some - shoot me a text.
-Cheers
-Ike