Hello from Colorado: I used to have a 66 Trade Wind that I did some serious renovations to. I enjoy the vintage Airstream hobby. Congratulations on your recent acquisition and pending project.
There are some interesting webpages that you might find interesting. I like the Airstream Inc website that has a document archive section. Then you can search 1959
and then Trade Wind. Here is a link to the info I found there.
You can also google search 1959
Trade Wind and find several threads in these Forums about folks renovating their trailers. You would likely learn a lot about your trailer doing that.
As mentioned, the Vintage Airstream Resource is a good website. Here is a link to some photos of the 59 Trade Wind. You can get an idea what it looked like back then.