I have decided to identify Christie cars by model year, as we do today. In years where more than one Christie model appeared, I decided to identify them, for example, as the 1906 Christie racer vs the 1906 Christie Touring Car. I feel this is the most logical approach. The car Christie raced in the 1907 French Grand Prix is therefore the 1907 Christie racer but often refered to as "the GP car". The 1909 Christie racer is often refered to as the "Barney Oldfield car" because Barney made the car famous while he owned it from 1912-1916.
I have identified the following Christie automobiles:
1903 Christie - the patent car.
1905 Christie racer
1906 Christie racer
1906 Christie Touring Car
1906 Christie Runabout
1907 Christie racer - the GP car
1908 Christie Runabout
1909 Christie Taxi
1909 Christie racer - the Barney Oldfield car