The designer of the stamp gives the following by this stamp:
The Cryolite mine in Ivigtût played a very important part in Greenland’s economy during the war, and it has therefore been chosen to be one of the ten images in the series, which reflects the war from the perspective of the Greenland people.
The Greenlanders did not work in the mine themselves, but there were some locals among the crew members onboard the ships that sailed the cryolite to the US. I have chosen the ship HANS EGEDE as a background photo, as it was one of the ships that carried commodities from the US to Greenland and returned with cryolite to the American war industry. During a voyage to the US in 1942, the HANS EGEDE was torpedoed by a German submarine and everyone on board died. Three Greenlanders died in the tragic incident.
HANS EGEDE details you can find: http://www.shipstamps.co.uk/forum/viewt ... gede#p9897
The complete story you can read in Greenland Collector Vol 22 see:
https://www.stamps.gl/sites/default/fil ... nglish.pdf
Greenland 2017 36.50 Kr sg?, scott?