The 1963 $10 bill with a red seal is a rare and valuable note. Its value can vary depending on its condition and other factors, such as whether it has any unique characteristics or errors. In general, a 1963 $10 bill with a red seal in good condition can be worth around $150 to $200. If the note is in exceptional condition, its value can be even higher. It is always best to have a note professionally graded in order to determine its exact value.