Postal card - 150 years

A postal stationary ( prepaid postcard ) from Austria 🇦🇹 

A prepaid postcard commemorating the 150 years of Postal card - with special postmark on Emmanuel Herrmann . 

Herrmann was the Austrian national economist who invented the use of a postcard .. it was called as Correspondenz Karte. It was first sent on October 1, 1869 from Vienna to Hungary. 

Several countries have commemorated the 150 years of postal card. 

A special postmark of Singapore 🇸🇬  on a postcard