It definitely looks like it was built that way originally. It doesn't look like an update was done.

Hi, I just purchased a 1991 B190 from a fellow in North Carolina. He purchased this in 1990 and has had it ever since. I notice one thing that seems to be entirely different on this unit - the bathroom is like the 1997 model. The toilet, shower and sink are all one unit. Anyone have an answer as to ...