I have an 02 Safari 25 with the queen bed in the back. My air conditioner is the 11000 btu dometic penguin. I am not sure how to tell if yours is an 11000 or a 135000 unit. Mine has the controls mounted overhead on the unit itself which may be an indication of an 11000. My previous trailer had a 13500 unit and the controls for it were integrated into the same thermostat that controlled the propane furnace.
Someone will probably chime in that knows how to tell for sure what size your unit is.
As far as model number: mine is a 25B. The 25B has a queen in the back, center bath, couch in the front with a window behind it.
Here is a link to AS specs. http://www.airstream.com/service/specifications/