Your boy's GT is looking remarkably “unmolested” as they say. He's lucky to have a dad with Airstream savvy. Glad you're keeping it mostly in its original vein of design. The ash woodwork looks marvelous. GTs are a great size in the single-axle line up.
I'm not sure why for 1969, Airstream execs decided to scrunch the bath into a windowless street-side closet. Maybe it makes better sense having the rear gaucho bed instead of the middle gaucho that stares at the kitchen appliances and restricts access to the rear bath? It's a mystery. Probably driven by the number of “sleeps” to advertise. I have an old '65 Caravel
magazine add where Airstream claims it “sleeps” up to six persons.
The '68GT is such a totally different trailer than the New Improved '69GT, but still, they share the wood, latches, lighting… The '69 windows are probably more rare and expensive than the often maligned '66-'68 Philips Cornings. Stashing original 1969 front wing windows could be a good retirement plan.
I've read that the short trailers were built only in the beginning of the “new model year” starting in the Fall, Like Detroit cars. Then, at some early actual year point, like February? the factory stopped making the less profitable short trailers, and switched production to the tandem axle models. If you ordered a new GT in May, you'd have to wait 'til next year's short model was available in the coming Fall. I wonder if all that is true. The '68GTs were serial numbered as Twins and Doubles. Maybe the '69s were too. My '68 is a Double (one gaucho across the front), and the serial number reflects that by a “series number” starting with 5(00) before the 37. It's the 37th Jackson Center 1968GT Double. I've never seen a 68GT Twin (that would be the front dinette with single bed/seats on curb and street-sides).
OK that was confusing, I'm betting that fewer than 100 total (East, West, Twin, Double) 1969GTs were ever made. I wonder if anyone knows. Perhaps my point is that the “finite number” of these vintage trailers is actually quite low, and folks like you are appreciated for keeping them in memorable condition.
Enjoy the Rocky Mountains….