You need to identify the make of chassis (look at the engine for identification).
Then you need to discover what bodybuilders were active around the time that the chassis was imported.
It's possible that the vehicle was imported bodied, and you would need to identify the country of origin of the chassis.
A picture of the Chalet at Kiandra:-
http://1.bp.blogspot.com/-0TJHNY7qgL...a+lodge+59.jpg
From (and more at):-
http://diane-adventurebeforedementia...hool-1959.html