Yep, that's a Westfalia 411A
quite a tidy looking thing, few things like the chrome trims are on the wrong way round, and I'd check that air intake isn't connected as well.
However, i would note the way the front panel look like its been repaired, and how the cab looks 4 point mounted (the 2 brackets either side of the chassis), that's not original and could mean it has a
**** chassis.