These images are the work of Jo Teeuwisse, a Historical Consultant in Amsterdam – and a master Retronaut. Over to Jo:
“Years ago I found some negatives in a fleamarket. I scanned them and put them online. I then found some of the spots in the photos and took pictures there.
In the picture above, you can see a group of young factory workers posing probably outside the factory during the war. I cheated a little bit by removing some pots of flowers which are on the steps today…!