Näytetään: Itävalta - Postimaksu maksumerkit (due stamps) (1910 - 1919) - 4 postimerkit.
1917
Not Issued Stamps Overprinted "PORTO" and Surcharged - Emperor Franz Joseph
huhtikuu VM: Ei mitään Perforaatio: 12½
![[Not Issued Stamps Overprinted "PORTO" and Surcharged - Emperor Franz Joseph, tyyppi I]](https://www.stampworld.com/media/catalogue/Austria/Postage-due-stamps/I-s.jpg)
![[Not Issued Stamps Overprinted "PORTO" and Surcharged - Emperor Franz Joseph, tyyppi I1]](https://www.stampworld.com/media/catalogue/Austria/Postage-due-stamps/I1-s.jpg)
![[Not Issued Stamps Overprinted "PORTO" and Surcharged - Emperor Franz Joseph, tyyppi I2]](https://www.stampworld.com/media/catalogue/Austria/Postage-due-stamps/I2-s.jpg)
![[Not Issued Stamps Overprinted "PORTO" and Surcharged - Emperor Franz Joseph, tyyppi I3]](https://www.stampworld.com/media/catalogue/Austria/Postage-due-stamps/I3-s.jpg)
