The 5 Kreuzer stamp issued by Austria in 1866 has some interesting details:

Design:

Features the coat of arms of Austria as the central design element
The imperial double-headed eagle is prominent within an oval frame
Inscribed “KAIS. KON. BRIEFMARKE” which means “Imperial Royal Postage Stamp”
Denomination “5 Kr.” is indicated at the bottom

Color:

Printed in a distinct red-brown shade

Printing Method:

Produced using typography (surface printing) by the State Printing Works in Vienna

Perforation:

The stamps had machine perforations of gauge 14

Usage:

The 5 Kr value paid the printed matter rate within the Austro-Hungarian Empire at the time
It was part of Austria’s second definitive stamp series issued in 1863-1864

Varieties and Rarity:

There are a few plate varieties known on this stamp that are of interest to specialists
Used examples canceled by certain scarcer cancellation types can be quite valuable
While millions were printed, centering issues and condition factor into its scarcity in top grades today

The 1866 5 Kreuzer is representative of the classic stamp issues from the era when Austria was part of the Austro-Hungarian Empire. Its imperial coat-of-arms design is iconic. Collecting stamps from this 19th century period, especially used on cover, is very popular for Austrian philately.