VTG Sterning Silver Turquoise Earrings Clip Signed N? E

VTG Sterning Silver Turquoise Earrings Clip Signed N? E Cannot completely make out signature. Looks like a handwritten N with a stamped E. Researched many sites with Native American hallmarks but was unsuccessful in finding this exact one. Earrings weigh 3 grams. These are from an estate dating most likely from the 60's or 70's. Some of the items I offer are previously owned items purchased at auctions, estates and yard sales, meaning they are used. I do not claim to be an expert on any of my items, but I do research the items before listing them. Please take time to look at all the photos, read the description and ask questions before purchasing. I am not familiar with the environment they come from. I do my best to describe the item(s) and provide multiple pictures. The color of photos is not always representative of a product's true color. I try to choose wording that best describes color or note a specific picture that most closely resembles it. Lighting and monitor settings will affect photo representations.