I know this is foreign, maybe German, but can someone help me a little with the make and approx value for these two. They are pretty much alike except one has a longer inner skirt (seen in the photos) and they both have NIP embossed in that little circle seen in photos. Any help will be appreciated. UPDATE; According to Caleb and the Worldwide Porcelain Insulator (1986 Supplement) these were made in Norway by Technique Fabricken. I may soon have the U-number for these.