What Airstream is this?

(SOLVED, see bottom of post)

A friend has an Airstream trailer that she wants to sell. She'd like to know what it is before she posts an ad. She says that it is about 22' from end-to-end. Here are some pictures she emailed us in hopes that some kind soul can identify it.

SOLVED. A guy on the Airstream forum has identified this as a 1954 "Safari." He provides this link: http://vintageairstream.com/photo-archives/1954-safari-22/

Many thanks to my reader for working on this puzzle.