From what I can read, looks like it's 22', either a Safari or a Flying Cloud, twin beds, 1962??
Someone else will do a much better job than I did above, but you can go to vintageairstream.com and click on photo archive, then the year of the trailer. At the beginning of each year's section is a "translation" of the VIN number.
Enjoy your trailer!
Richard and Vivian
Caliban The Wonder Dog: gone but not forgotten
Too many vintage A/Ss...