The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Vienna. Opera House by Night. Rau Color
Wien. Staatsoper. Vienna. Opera House. Vienne. Le Theatre de lOpera. Rau Color Hans H. Rau
Vienna. The Opera House. C. Bauer. Nr. 454
Vienna. The Opera House. C. Bauer
Vienna. The Opera House. Hans H. Rau
Vienna. The Opera House. Hubmann. RP
Vienna. The Opera House. A. Kellner. 1969
