Another passion of mine --- land navigation and orienteering. Recently received this toy. A vintage Silva Type 6 I believe to be from the late 1930s or 1940s made for the military market (likely Norwegian). The compass is Swede and the base plate Norwegian. The housing is domed vs. flat and the compass is air filled and induction dampened. The needle housing top is graduated in angular mils (6400 in a complete circle), and the bottom is graduated in gradians (400 in a complete circle) hence my likely correct assumption it was made for the military market. But which military? Would appreciate or Northern European friends here weighing in on my assumptions about year of manufacture and for whom manufactured..
Interesting find Leghog. While Sweden maintained a position of neutrality in WW2, its military spending increased massively from 1936 (going from $37 Million in 1936 to over $527 in 1942). It began drafting conscripts for military service in 1938. Possibly your compass was produced as part of these preparations (or possibly post-WW2)? Norway also had a policy of strict neutrality after Hitler's invasion of Poland in 1939, but was invaded by Germany in 1940.
While researching an older pocket compass some time ago, I found these sites very helpful:
http://trademarklondon.com/The-Compass/index.html
http://www.compassmuseum.com/
Edit - Sorry, having to rush today as I'm supposed to be working! Leghog, have you identified the mark on the right of the base plate?