A pair of sterling earrings from the 1960's , designed and crafted by Bjorn Sigurd Ostern for David Andersen , Norway. This line came out in the 1950's with the screw backs, but were carried forward into the 1960's with the posts for those with pierced ears. The design is based Norse legend of Thor's Hammer. According to Wikipedia " In Norse Mythology MJOLNIR ,is the hammer of the God of Thunder Thor. The hammer is depicted as the most fearsome of weapons, capable of leveling mountains." I wonder if they chose this motif as a reference to the 'ban the bomb' movement in the 1950's. Whatever the meaning, these earrings represent the symbolism of ancient Norse legend , and have meaning for that culture. They are evocative for collectors of vintage Norwegian jewellery. The earrings measure 1 & 1/2 inches long and 1/2 of an inch at the paddle. They are both clearly marked " D-A NORWAY ,STERLING 925S. I have cleaned these earrings very minimally, leaving some tarnish . They are in excellent condition.