Hey Tom, I think the 22's might be Flying Clouds. Rick Davis and Tom Howarth are both experts on 50's models. If they are lurking, you might hear from them.

The Flying Cloud came out in 1953 supposedly as a 21footer. Sometimes I see it as a 22 or a 23. Depends on who is measuring. The Caravanner was a 23 footer in 1957. Safari 22 ft 1951
Tradewind 24 ft 1952

Sometimes the serial numbers yield a few clues.

You might also look behind the cabinets or under the beds for factory marks or a schematic glued to the wall near a fuse box. I had to completely tear out the interior of my tradewind before I found writing indicating the cabinets were made of Ash in SS (Santa Fe Springs)

Have Fun,

Bill

Subject: [airstream] Model Names
Date: Tue, 12 Jan 1999 01:11:31 -0400
From: Tom Walden
Reply-To: airstream@airstream.net
To: don@calldon.com

Hello Don,

I have 4 '50s Aristreams and two of them are 22'. Do you know how to differentiate between the models. The 55 is a rear twin bed with a dinette on the side and a front bath and kitchen. It is one of the most homey and livable of all the trailers because the dinette is permanent and the beds are, too. No set up involved really for activities. If
you make your beds up they form a rear living room. The other ('56) is the most recent addition -- it is a rear double and rear bath with a standard front sofa. The other two are easy, a 58 Bubble and a 56 Overlander. Just don't have names on the other two and am curious as to what they should be called. The 55 twenty two footer is more simple and less luxurious than the 56, if that is any indication. I really am happy
with all four and want to get all systems working in them all. Be glad of any information you can provide.

Tom Walden
VAC
WBCCI 2897