Ahhhhhhhhh.....
Thanks for that Odulf and you must be very proud of your Grandfather. It's a beautiful medal and the ribbon is especially striking. I found the following via Google which sort of answers my confusion re the award of a Resistance Medal in Holland...........
It should not to be confused with the rarer and more prestigious Dutch Cross of Resistance (Dutch: Verzetskruis), the second highest decoration for valour in the Netherlands, which was instituted in 1946 and awarded to only 95 people. There was a belief after the War that awarding medals would make distinctions between different acts of resistance, all of which would have been punishable by death. After a first round of awards were made of the Dutch Cross of Resistance in 1946, it became politically difficult to agree a list of further recipients.
It seems that the Government quite rightly decided to reward the Resisters with a medal, but took their time doing so! Do you know what other medals he was given at the time of the war (or just after)? I know what I am looking for now and am glad that I can have a represtative medal for the Netherlands in my Resiters/Partisans group. They were a remarkable band of men and women and really suffered at the hands of the German occupiers.
Thanks for taking the trouble to post the image. Much appreciated.