Magnetic compass, e.g. for incorporation in a wristwatch has a magnetic body within a housing with markings on the housing, body or rotating scale indicating one to twelve in addition to, or instead of, compass point markings
摘要
<p>Compass has the numbers one to twelve arranged within its housing or on a rotating scale or on the magnetic body itself. In the latter case the number twelve takes the place of the south indicator, while the number three replaces the west indicator and so on.</p>
