Norwegian Design sterling silver handmade Necklace. Vintage designer necklace by Anna Greta Eker mid century, modernist, 1960s with original box. Sleek Modernist design Collar with drop. The Collar will fit a variety of neck sizes, open in the back and flexible Mid Century Norway Designs: According to Fred Rezazadeh in his Collectible Silver Jewelry Book page 123 “Some of the jewelry by major Norwegian designers was first created for Norway Design Center at Plus in Fredrikstad. Norway Design was a large shop in Oslo with a branch also in Trondheim C1958. The company was established by Per Tannum. The aim of this center was to preserve and utilize traditional Norwegian arts and crafts. In the field of jewelry, new concepts with simple modern designs were introduced at Plus executed in gold silver and pewter. The common mark for Plus is superimposed letters “ND” which appear as a thick letter “N” on the jewelry along with the + sign. This mark is then accompanied by the designer’s name or initials.