1970, Austria. Original artist's painting by Prof. Otto Stefferl for the stamp "Tower Clock 1450-1550" out from the series "Old Clocks from Vienna Horological Museum". Acrylic and collage in black and white without backdrop coloring on card. Passepartout framing. ISSUED DESIGN. Size (netto) 210x272 mm. Some printer's notes on the reverse. UNIQUE ARTWORK. (Mi #1328) (MS) (Tax Method: Margin System) (Image)

1970, Austria. Original artist's painting by Prof. Otto Stefferl for the stamp "Lyre Clock 1790-1850" out from the series "Old Clocks from Vienna Horological Museum". Acrylic and collage in black and white without backdrop coloring on card. Passepartout framing (slightly creased). ISSUED DESIGN. Size (netto) 210x272 mm. Some printer's notes on the reverse. UNIQUE ARTWORK. (Mi #1344) (MS) (Tax Method: Margin System) (Image)

1970, Austria. Original artist's painting by Prof. Otto Stefferl for the stamp "Pendant Watch 1800-1850" out from the series "Old Clocks from Vienna Horological Museum". Acrylic and collage in black and white without backdrop coloring on card. Passepartout framing. ISSUED DESIGN. Size (netto) 210x272 mm. Some printer's notes on the reverse. UNIQUE ARTWORK. (Mi #1345) (MS) (Tax Method: Margin System) (Image)

1970, Austria. Proof in black (marked as 3th phase/End) for the issue "Ancient Clocks" showing "Bracket Clock 1720-1760". Hinge marks on the reverse. (Mi #1330) (Tax Method: Margin System) (Image)

1970, Austria. Original artist's painting by Prof. Otto Stefferl for the stamp "Bracket Clock 1720-1760" out from the series "Old Clocks from Vienna Horological Museum". Acrylic and collage in black and white without backdrop coloring on card. Passepartout framing. ISSUED DESIGN. Size (netto) 210x272 mm. Some printer's notes on the reverse. UNIQUE ARTWORK. (Mi #1330) (MS) (Tax Method: Margin System) (Image)

1970, Austria. Original artist's painting by Prof. Otto Stefferl for the stamp "French Column Clock 1820-1850" out from the series "Old Clocks from Vienna Horological Museum". Acrylic and collage in black and white without backdrop coloring on card.Passepartout framing. ISSUED DESIGN. Size (netto) 210x272 mm. Some printer's notes on the reverse. UNIQUE ARTWORK. (Mi #1346) (MS) (Tax Method: Margin System) (Image)