This is the model before the A4, called the Acoustibass. It features a great thumb rest, which is missing from the A4/A5.
This one is at Bass Northwest. I have bought from them and they have shipped to me here in Switzerland.
http://www.bassnw.com/Used Basses/godin_acoustibass_4_st.htm
I imagine the Acoustibass balanced better than the A-4/A-5 due to the double cutaway, but I never liked the looks of that big-ass thumbrest or the control plate for the EQ and volume sliders. I'm glad they left those features off of the newer basses. The Acoustibass had those metal tines under the bridge as opposed to the A-4/A-5's cello bracing. I've never compared the two side-by-side.
- Steve