Date of Issue September 15th 1961; Special-postage stamps
- Headframe of the Wolkersdorfer Schacht,
- Rotor of a Large Generator of the Elin-Union,
- Blast Furnaces of the Austrian Alpine-Montangesellschaft,
- LD Steel Works Voest, Linz
- Large Refinery Schwechat of ÖMV A.G.