18 June (Austria ) within release Austrian constabulary, 150th anniversary goes into circulation Stamp Letters K and I face value 7 Austrian schilling
Stamp Letters K and I in catalogues | |
---|---|
Michel: | Mi:AT 2289 |
Stamp Number: | Sn:AT 1791 |
Yvert et Tellier: | Yt:AT 2119 |
Stamp is vertical format.
Also in the issue Austrian constabulary, 150th anniversary:
Stamp Letters K and I it reflects the thematic directions:
An optical instrument is a device that processes light waves (or photons), either to enhance an image for viewing or to analyze and determine their characteristic properties. Common examples include periscopes, microscopes, telescopes, and cameras.