Received this some years back from a friend who was a sailor he said they use this several times a day to help dictate weather changes and sea conditions , it is in fine original vintage condition and works perfectly to gauge wind speed up to 75 mph has two different gauges, Overall about 9 inches tall with its protective cap was made in western Germany I’ve learned that my air conditioner in my car comes out at 30 mph lol really need item that still works great