Terry, if you keep poking around you will find it is an F2 Dino 166, with chassis no 014. There are several mentions of it around, including TNF.
After much searching I have also reached conclusion that Medlin's car is a F2 Dino with chassis #14. It was used in 1969 by Clay Regazzoni and Tino Brambilla. After that it is a mystery until it turned up with Medlin.
I cannot see anywhere that it has been sold by Medlin.