Greenland has a countrywide system if I remember correctly. I’ve found some sirens in the south of the country before, Danish ones I believe as Greenland is a colony of Denmark if I am not mistaken. Great find on the STH!
There is an Air Force base on the island too. It may have something. Just a thought
Ripe old age of 26.
1950 Model A, 1979 AF Timer, 30 something ID tags, some other odds and ends
Registered Skywarn spotter as of 4/29/18
Most of the sirens I saw when I visited Greenland last summer looked like this, and the towns were well covered. In Narsaq, a town of about 3,000 people, I counted seven of these.