My guess is a 2010 model made in 2009. The 2009 USA catalog shows only Rize 1, 2, 3, 4, and 5 with the 1 and 2 being carbon. All the photos show One, Two, etc. on the side of the top tube. The 2010 catalog I have shows 5 RZ One Forty models with the 1 and 2 being carbon.
Interesting that...