Greetings and welcome from Colorado, USA. I always enjoy meeting folks from around the world here on these Airstream Forums. I nearly purchased a 1959
Overlander years ago. That is what the seller said it was, but I never verified it through the serial number. It was in good shape, but I found a 1966
Trade Wind 24' I liked better instead. I understand dual axles were an option in 1959
. This trailer was a single axle model. Here are some photos of the 1959
And here are some URL internet links to information on the 1959 Overlander. Maybe they will help you, and maybe not.
WBCCI #8607 VAC Region 11
KnowledgeBase trailer renovation threads: 69 Globetrotter, 76 Sovereign, 75 Overlander, 66 Trade Wind Such fun !