Artelleristilling nr. 1 - Hegra festning
7,5 cm kanon. Bildet er trolig tatt i maidagene 1940.
Funnet på wikipedia.
This image is in the public domain because the Norwegian Copyright law (§43a) specifies that images not considered to be "works of art" become public domain 50 years after creation, provided that more than 15 years have passed since the author's death or the author is unknown.