Welcome to the forums!
1980 was a transition year that lasted into 1981. Your VIN (225D0J1445)looks a lot like a 70's VIN, except for the first number. If the first 2 was an E it would match with an Excella. Maybe it signifies it is an Excella II, I'm not sure. The rest looks fine; 25 foot, double bed, 1980 and made in Ohio.
My weight chart only shows Excella II. Internationals and Caravels being made that year. Your trailer on my list shows a dry weight of 4212 and a hitch weight of 604.
Wally Byam Airstream Club 7513