Serial Number question

[Hittenstiehl]

We have a 1965 Tradewind? with Serial Number SO 24 5526. With some research and suggestions we believe that indicates:
S = Santa Fe Springs CA
O = Overlander? but we've been told its a Tradewind
24 = 24' Length Tongue to Bumper
5 = the first digit five is the year, as in 65
526 = over 500 is a double bed and the 26th made that year?

The inner layout matches exactly to the diagram from Airstream of the 65 TW.

Thanks for your input or corrections.

[Hittenstiehl]

So after some additional research I ended up on the Vintage Airstream site and saw that the "O" stands for Landyacht. The following script was pasted from their site.

1965 Tradewind 24′
Ohio | J O(I) 24 5 NNN
California | S O(I) 24 5 NNN
(5NN suffix for Double-bed layout)
(O for Landyacht options, I for Int’l options)
First year the serial numbers adopt a common format between the factories.
It is not hard to see why the 1965 model year is considered to be one of the best. The Tradewind example is the double-bed layout with lots of Honduran Mahogany, solid steel appliances, Zolatone walls (last year) and a beautifully designed fiberglass bathroom

[InsideOut]

Looks like you got it figured out! Cool!

Shari