Stamps, Austrian inventors design type

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Austria

semipostal

1936, Dec 6 Austrian inventors unwmk p. 12.5 (6 stamps)
Colnect-135-960-Joseph-Ressel-1793-1857-ship--s-propeller.jpgColnect-135-961-Carl-von-Ghega-1802-60-Semmeringbahn.jpgColnect-135-962-Joseph-Werndl-1831-89-weapons-technology.jpgColnect-135-963-Carl-Auer-von-Welsbach-1858-1929-gas-mantle-light.jpgColnect-135-964-Robert-von-Lieben-1873-1913-electrons-amplifier-tube.jpgColnect-135-965-Viktor-Kaplan-1876-1934-Kaplan-turbine.jpg
- 12+12g Josef Ressel & screw propeller
- 24+24g redvio Carl von Ghega 1802-60 Semmeringbahn
- 30+30g redpur Joseph Werndl
- 40+40g blblk Carl Auer von Welsbach
- 60+60g viobl Robert von Lieben
- 64+64g dkgrn Viktor Kaplan

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