The product is an original WW II military quadrant spirit level, likely used by the US Army, Navy, Air Force, or Marines. This vintage item comes with its original case or box, adding to its authenticity and collectible value. Made in the United States during the WWII era, this quadrant spirit level is a rare find that would be a great addition to any militaria or historical artifacts collection. Its originality and connection to the armed forces of the United States during the war make it a valuable piece of history.