This is a compass. It will show you were North is.
A pocket sized brass compass is not a laughing matter. Nor is it a matter for your local mailman. Although they may use it as well, we consider this timeless piece of equipment as effective as the stamp on a letter. Use it when you need to. Use it when you don't have an electronic mapping device. Use it to impress people with your worldly knowledge of the magnetosphere's influence on international trade deadlines.