1970, Austria. Original artist's painting by Prof. Otto Stefferl for the issue "Vienna Music Academy Building, Centenary" showing "Organ, Great Hall, Music Academy". Acrylic and collage on card with passepartout framing. ISSUED DESIGN. Size (netto) 215x143 mm. Some printer's notes on the reverse. Additionally there are 3 more artworks for this issue: 2 of them show non-adopted designs and the other ones shows the stamp's centerpiece in black and white (all acrylic on card; various sizes). UNIQUE ARTWORKS. (Mi #1327) (MS) (Tax Method: Margin System) (Image)

1971, Austria. Proof in black (marked as 3th phase/End) for the issue "Intl. Choir Festival, Vienna" showing "Singer with Lyre". No face value and no inscriptions. Hinge marks on the reverse. (Mi #1365) (Tax Method: Margin System) (Image)