The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Australia. N. S. W. Sydney Opera House. John Sands Pty. Robin Smith
Australia. Sydney Opera House. N. S. W. John Sands Pty Ltd
The Sydney Opera House. Engelander Enterprises
Greetings from Sydney. Sydney Opera House. Engelander Trading Co. Etco. 1977
Famous Sydney Opera House. Engelander Trading. 1976
Sydney. New South Wales. Australia. Sydney Opera House and Harbour Bridge at dusk. David Messent
Sydney. New South Wales. Australia. Sydney Opera House and City. David Messent
Sydney Australia. Sydney Opera House and The City. David Messent